Bearing hanging tool and bearing

Abstract

To provide a bearing hanging tool, configured at low cost and compactly, which can stably hang a large-sized bearing, and a bearing which can be stably hung by the bearing hanging tool and whose strength can be kept.SOLUTION: A bearing hanging tool, which can hang an assembly which has conical rollers or cylindrical rollers and a raceway ring in which a raceway surface on which the conical rollers or the cylindrical rollers are arranged in parallel using a holding tool is formed between flange parts arranged at both sides in an axial direction, in a hanging posture in which the axial direction is directed toward a vertical direction, comprises a base part opposing to an upper surface of the raceway ring, a locking part that extends downward from the base part and is locked to the flange parts, an eyebolt that is fastened to a bolt hole in the vertical direction formed in the base part, and a pressing part that is pressed against the upper surface of the raceway ring, where the locking part is locked to a step part formed on the upper flange part in the axial direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a bearing hanger and a bearing. [Background technology]

[0002] Conventionally, Patent Document 1 discloses a method of assembling a large, heavy rolling bearing used in wind power generators and tunnel boring machines onto a rotating shaft by drilling a bolt hole in the inner ring for fastening an eye bolt, connecting the eye bolt to a lifting hook, and hoisting the large rolling bearing with a crane.

[0003] Patent Document 2 discloses a shaft installation device for a tapered roller bearing, which has an annular clamp arm support that can be raised and lowered, a number of clamp arms that are attached to the clamp arm support so as to be able to open and close freely, and a clamp claw-type member attached to the clamp arm, and which discloses a method of lifting a large tapered roller bearing and installing it on a shaft by inserting and engaging the clamp claw into the gap between the small rib portion of the inner ring and the small diameter end face of the tapered roller. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-322548 A [Patent Document 2] JP 2015-182177 A Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 aims to suspend a bearing from a compact suspending device, but because the bolt hole formed in the inner ring to secure the eye bolt extends close to the raceway surface of the inner ring, the hoop stress caused by the heavy rolling bearing acts on the bolt hole, making it easy for cracks to occur starting from the bolt hole, and there is a problem that the strength of the bearing may not be sufficient. Patent Document 2 aims to lift a bearing without creating bolt holes on the bearing side, but because the clamp claws are provided on a clamp arm support that is formed in a ring shape and is roughly the same size as the top surface of the bearing, there is an issue that the entire device becomes large, which requires effort and cost to manufacture and store.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a bearing hanger that is capable of stably suspending a large bearing and is constructed to be low cost and compact, and a bearing that can be stably suspended by the bearing hanger and can maintain high strength. [Means for solving the problem]

[0007] The above object of the present invention can be achieved by the following configuration. (1) A bearing suspender capable of suspending an assembly having tapered rollers or cylindrical rollers, and a raceway ring having a raceway surface on which the tapered rollers or cylindrical rollers are arranged side by side using a cage between ribs arranged on both axial sides, in a suspending position with the axial direction facing up and down, a base portion facing an upper surface of the race; a locking portion extending downward from the base portion and locked to the flange portion; An eyebolt is fastened to a vertical screw hole formed in the base; a pressing portion that is pressed against an upper surface of the raceway, The locking portion is locked to a step portion formed on the axially upper side of the flange portion. Bearing lifting device. (2) An assembly suspended from the bearing suspension device according to (1), The step portion is formed in an annular shape around the entire circumference of the flange portion. Bearing. (3) An assembly suspended from the bearing suspension device according to (1), The step portion is provided in three or more and is arranged at equal intervals around the axis of the raceway. Bearing. Effect of the Invention

[0008] According to the present invention, a bearing suspender capable of stably suspending a large bearing is constructed at low cost and in a compact manner, and the strength of the bearing stably suspended by the bearing suspender can be maintained high. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a bearing suspending mechanism including a bearing suspender and an inner ring assembly that constitutes a bearing according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of a main portion showing a bearing hanger attached to an inner ring assembly. [Diagram 3] FIG. 3 is a cross-sectional view of a main portion showing a bearing hanger attached to an inner ring. [Figure 4] FIG. 4 is a bottom perspective view of a main portion showing the inner ring. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The configuration of a bearing hanging mechanism to which the bearing hanger of the present invention is applied will be described below with reference to the attached drawings. Each drawing has been created for the purpose of explaining the present invention, and the embodiment of the present invention is not limited to the contents shown in the drawings. In the following description, the hanging position of a bearing (inner ring assembly or outer ring assembly) refers to a state in which the axial direction of the bearing faces the up-down direction, and the radial direction of the bearing is a direction perpendicular to the axis of the bearing and is also called the radial direction. In addition, the radial inner side refers to the direction toward the axis of the bearing, and the radial outer side refers to the direction away from the axis of the bearing.

[0011] Fig. 1 is a perspective view showing a bearing suspending mechanism including a bearing suspender according to one embodiment of the present invention and an inner ring assembly constituting a bearing. Fig. 2 is a cross-sectional view of a main part showing the bearing suspender attached to the inner ring assembly. Fig. 3 is a cross-sectional view of a main part showing the bearing suspender attached to the inner ring. Fig. 4 is a bottom perspective view of a main part showing the inner ring.

[0012] 1 has an inner ring assembly 10 that constitutes a bearing, a plurality of bearing hoisting tools 20, a wire 2, and a hoisting means (not shown) consisting of a crane or the like. The bearing hoisting mechanism suspends the inner ring assembly 10 in a suspended position via the hoisting means and wire 2, for example, to perform the task of installing the inner ring assembly 10 onto a specified rotating shaft. At least three bearing hangers 20 are detachably attached to the inner ring assembly 10, and each of the bearing hangers 20 is disposed at equal intervals around the axis of the inner ring assembly 10. In the example shown, three bearing hangers 20 are attached to the inner ring assembly 10. The wire 2 is a connector that connects the bearing hangers 20 to a lifting means such as a crane, and has a hook member 3 attached and fixed to one end thereof to be engaged with each of the bearing hangers 20. The wire 2 may be a chain or a rope.

[0013] (Inner ring assembly 10) The inner ring assembly 10 has an inner ring (raceway) 12, tapered rollers 13 which are rolling elements, and a cage 14. In the inner ring assembly 10, a plurality of tapered rollers 13 are arranged side by side on a raceway surface 12a formed on the outer circumferential surface of the inner ring 12 using the annular cage 14. The cage 14 has positioning holes formed along the raceway surface for arranging the tapered rollers 13 side by side along the raceway surface. This configuration can be seen in FIG. 1. The inner ring 12 has a small flange 12b formed on the outer surface at its axial upper end and a large flange 12c formed on the outer surface at its axial lower end. An annular raceway surface 12a formed on the outer peripheral surface of the inner ring 12 is inclined radially inward toward the axial upper side. The bearing hanger 20 is attached and fixed to the small flange portion 12b of the inner ring 12, so that the bearing hanger 20 is disposed above the upper end surface 12d of the inner ring 12. This configuration can be seen in FIGS.

[0014] Furthermore, small flange portion 12b of inner ring 12 protruding radially outward has step portion 31 formed by cutting out an L-shape in the lower half in the axial direction radially inward. Step portion 31 is a surface perpendicular to the axial direction of inner ring 12, and has locking surface 31a where bearing hanger 20 is locked, and notched surface 31b formed along the outer circumferential surface of inner ring 12, where bearing hanger 20 is locked. In this embodiment, the step portion 31 is formed in an annular shape over the entire circumference of the small flange portion 12b of the inner ring 12. This configuration can be seen in FIGS.

[0015] (Bearing hanger 20) The bearing hanger 20 has a base portion 21, a locking portion 22, and an eyebolt 23. This configuration can be seen in FIGS. The base 21 is a plate-like or block-like member disposed at a position facing the upper end surface 12d of the inner ring 12. A locking portion 22 is integrally formed on the radially outer side of the base 21, extending downward and locked to the small flange portion 12b of the inner ring 12. A bolt hole 21a is formed in the base 21, penetrating in the vertical direction, at a portion overlapping the upper end surface 12d of the inner ring 12 in a plan view, and an eyebolt 23 is fastened to the bolt hole 21a.

[0016] The locking portion 22 has a hook portion 22a extending downward from the radially outer end of the base portion 21. The width of the engagement portion 22 protruding radially outward from the upper outer edge of the inner ring 12 is shorter than the gap h1 formed between the upper outer edge of the inner ring 12 and the upper inner edge of the cage 14. This configuration can be seen in Figures 1 and 2.

[0017] Hook portion 22a is bent into a hook shape so as to be able to engage with step portion 31 formed on small flange portion 12b. An inclined portion 22c is formed at the tip of hook portion 22a, inclining outward in the axial direction as it extends axially downward. In addition, a protective cover 17 is provided at the tip of hook portion 22a to protect small flange portion 12b from contact with step portion 31. A retraction portion 26 is formed at the lower portion of the hook portion 22a, which is an inclined surface cut out so as to avoid contact with the tapered rollers 13 arranged on the raceway surface 12a and the cage 14. This configuration can be seen in FIG.

[0018] According to this configuration, by inserting the locking portion 22 into the gap h1 between the upper outer edge of the inner ring 12 and the upper inner edge of the cage 14, the hook portion 22a can be locked to the step portion 31. Hook portion 22a is provided with inclined portion 22c at its tip, so that the tip of hook portion 22a can easily engage with notched surface 31b of step portion 31 all the way to the back where it comes into contact with the step portion 31, making it difficult for hook portion 22a to come off from step portion 31. The retraction portion 26 provided on the lower side enables the hook portion 22a to be engaged with the step portion 31 formed on the small rib portion 12b without contacting the tapered rollers 13 and the cage 14. Therefore, the engaging portion 22 can engage the hook portion 22a with the step portion 31 of the small rib portion 12b from any position in the circumferential direction of the inner ring assembly 10.

[0019] The eye bolt 23 is a bolt having a ring portion 23a formed at its head to which the hook member 3 is engaged, and is also called a hanging bolt. The vertical position of eyebolt 23 can be adjusted by adjusting the amount of fastening into bolt hole 21a of base 21. That is, pressing portion 23b at the lower end of eyebolt 23 can press upper end surface 12d of inner ring 12 downward. At this time, pressing portion 23b of eyebolt 23 and upper end surface 12d of inner ring 12 are in surface contact with each other by providing pressing plate 25. This configuration can be seen in FIG. 3. The pressure plate 25 may be separate from the eyebolt 23 , or may be provided integrally with the pressure portion 23 b of the eyebolt 23 , or may be provided on the upper end surface 12 d of the inner ring 12 .

[0020] (Action and Effects)

[0021] According to the above-mentioned configuration, hook portion 22a of bearing hanger 20 is engaged with step portion 31, so that base portion 21 is positioned above upper end surface 12d of inner ring 12, and then upper end surface 12d of inner ring 12 is pressed downward by pressing portion 23b of eyebolt 23. In other words, small flange portion 12b is sandwiched vertically between hook portion 22a and pressing portion 23b, so that bearing hanger 20 can be detachably attached to inner ring 12.

[0022] At this time, because the hook portion 22a does not interfere with the tapered rollers 13 and cage 14 arranged on the raceway surface 12a due to the retraction portion 26, when engaging the locking portion 22 with the small rib portion 12b, it is not necessary to adjust the position of the tapered rollers 13 or to adjust the installation position so that the hook portion 22a is positioned in the space between adjacent tapered rollers 13. This simplifies the task of engaging the locking portion 22 with the small rib portion 12b.

[0023] Furthermore, because the step 31 is formed by cutting out a portion of the small rib portion 12b of the inner ring 12, the step 31 does not affect the thickness of the inner ring 12 in the radial direction of the raceway surface 12a. Furthermore, the tapered rollers 13 are guided by the large rib portion 12c, and when they are subjected to a load, the load is also received by the large rib portion 12c. Therefore, even if the step 31 is formed in the inner ring 12, the strength of the inner ring assembly 10 (tapered roller bearing) can be maintained high.

[0024] The object to be suspended by the bearing hoist 20 may be a tapered roller bearing in which an outer ring (not shown) is assembled to the inner ring assembly 10. In this case, the bearing hoist 20 can suspend the tapered roller bearing in a suspended position with the same configuration as in the above example.

[0025] Similarly, the object to be suspended by the bearing suspender 20 may be an outer ring assembly (assembly) that constitutes an outer ring double-ribbed cylindrical roller bearing. The outer ring assembly includes an outer ring with flanges on both sides (not shown), cylindrical rollers, and a cylindrical roller cage. Further, the outer ring of the cylindrical roller bearing (or outer ring assembly) has a step 31 of a size that does not overlap the contact position between the roller head and the rib surface when viewed from the axial direction. This allows the outer race assembly to be suspended in a suspended position, similar to the above example.

[0026] Second embodiment The step portion 31 may be formed to have a width that allows the hook portion 22a to be fitted and engaged with the small flange portion 12b that is formed in an annular shape along the upper end of the inner ring 12. In this case, at least three or more step portions 31 are provided along the small flange portion 12b, and the step portions 31 are disposed at equal intervals around the axis of the inner ring 12.

[0027] According to this configuration, the position at which the locking portion 22 is locked to the small flange portion 12b is determined by the position of the multiple step portions 31 formed along the small flange portion 12b, making it easier to position the bearing hanger 20 at equal intervals along the inner ring 12. Furthermore, by fitting the hook portion 22a into the step portion 31, the inner ring assembly 10 suspended by the bearing hanger 20 is restricted from axially rotating in the circumferential direction. Therefore, the inner ring assembly 10 suspended by the bearing suspension tool 20 becomes more stable in the suspended position.

[0028] The present invention is not limited to the above-described embodiments, and can be modified and improved as appropriate.

[0029] As described above, the present specification discloses the following: (1) A bearing suspender capable of suspending an assembly having tapered rollers or cylindrical rollers, and a raceway ring having a raceway surface on which the tapered rollers or cylindrical rollers are arranged side by side using a cage between ribs arranged on both axial sides, in a suspending position with the axial direction facing up and down, a base portion facing an upper surface of the race; a locking portion extending downward from the base portion and locked to the flange portion; An eyebolt is fastened to a vertical screw hole formed in the base; a pressing portion that is pressed against an upper surface of the raceway, The locking portion is locked to a step portion formed on the axially upper side of the flange portion. Bearing lifting device. According to this configuration, the bearing hoist can stably suspend a large bearing, and can be configured to be low-cost and compact. Furthermore, the strength of the bearing stably suspended by the bearing hoist can be maintained high.

[0030] (2) The locking portion has a retraction portion that avoids contact with the cage and the tapered rollers or the cylindrical rollers provided on the raceway surface. A bearing hanger as described in (1). According to this configuration, the retracted portion prevents the locking portion from interfering with the cage and tapered rollers or cylindrical rollers provided on the raceway surface, facilitating attachment of the bearing hanger to the assembly.

[0031] (3) A pressing plate is provided between the pressing portion and the upper surface of the raceway surface. A bearing hanger as described in (1) or (2). According to this configuration, the pressing portion and the upper surface of the inner ring are in surface contact with each other, so that the bearing hanger can be attached to the inner ring more firmly.

[0032] (4) The locking portion is formed in a hook shape so as to be locked to the step portion, and a sloped portion is provided at a tip of the locking portion, the sloped portion being sloped in a direction away from the step portion along the axial direction. A bearing hanger according to any one of (1) to (3). According to this configuration, the locking portion can be easily locked to the step portion, and is therefore less likely to come off from the step portion.

[0033] (5) An assembly that is suspended from the bearing suspension tool according to any one of (1) to (4), The step portion is formed in an annular shape around the entire circumference of the flange portion. Bearing. According to this configuration, the engaging portion can be engaged from anywhere on the flange portion, making it easy to attach the bearing hanger to the assembly.

[0034] (6) An assembly suspended by the bearing suspension tool according to any one of (1) to (5), The step portion is provided in three or more and is arranged at equal intervals around the axis of the raceway. Bearing. According to this configuration, the mounting positions of multiple bearing hangers can be accurately determined by simple processing, so that the assembly suspended in a suspended position by the bearing hangers, or the bearing including the assembly, becomes more stable. [Explanation of symbols]

[0035] 2 Wire 3 Hook member 10 Inner ring assembly (assembly) 12 Inner ring (raceway, bearing ring) 12a Raceway surface 12b Small tsuba part (tsuba part) 12c Otsubabe 12d Top surface 13 Tapered roller 14 Cage 17 Protective cover 20 Bearing hanger 21 Base 21a Bolt hole 22 Locking part 22a Hook part 22c Slope 23 Eyebolt 23a Ring section 23b Pressing part 25 Pressure plate 26 Evacuation Area 31 Stepped section 31a Locking surface 31b Notch surface h1 Gap

Claims

1. A bearing suspender capable of suspending an assembly having tapered rollers or cylindrical rollers, and a raceway ring having a raceway surface formed by using a cage between ribs arranged on both axial sides of the assembly, the raceway surface being such that the tapered rollers or cylindrical rollers are arranged side by side, in a suspending position in which the axial direction is oriented vertically, a base portion facing an upper surface of the race; a locking portion extending downward from the base portion and locked to the flange portion; An eyebolt is fastened to a vertical screw hole formed in the base; a pressing portion that is pressed against an upper surface of the raceway, The locking portion is locked to a step portion formed on the axially upper side of the flange portion. Bearing lifting device.

2. the engaging portion has a retreat portion that avoids contact with the cage and the tapered rollers or the cylindrical rollers provided on the raceway surface, 2. The bearing hanger of claim 1.

3. A pressing plate is provided between the pressing portion and the upper surface of the raceway surface.

2. The bearing hanger of claim 1.

4. The locking portion is formed in a hook shape so as to be locked to the step portion, and a sloped portion is provided at a tip of the locking portion, the sloped portion being sloped in a direction away from the step portion along the axial direction.

2. The bearing hanger of claim 1.

5. An assembly suspended by the bearing hanger according to any one of claims 1 to 4, The step portion is formed in an annular shape around the entire circumference of the flange portion. Bearing.

6. An assembly suspended by the bearing hanger according to any one of claims 1 to 4, The step portion is provided in three or more and is arranged at equal intervals around the axis of the raceway. Bearing.

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