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, a recessed part for positioning recessed on the upper surface of the raceway ring, and a pressing part provided between the eyebolt and the upper surface of the raceway ring, where the pressing part fits to the recessed part.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 clamp claws that are attached to the clamp arms, and which discloses a method of lifting a large tapered roller bearing and installing it on a shaft by inserting and engaging the clamp claws 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 of approximately 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 eye bolt is fastened to a vertical bolt hole formed in the base portion; a positioning recess provided in an upper surface of the raceway; a pressing portion provided between the eye bolt and an upper surface of the raceway surface, The pressing portion fits into the recess. Bearing lifting device. (2) An assembly suspended from the bearing suspension device according to (1), The recesses are provided in three or more numbers and are 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 an exploded perspective view of a main portion showing a bearing hanger attached to an inner ring assembly. FIG. [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 an overall perspective view showing the inner ring. [Diagram 5] FIG. 5 is a cross-sectional view of a main portion showing a bearing hanger attached to an inner ring of the second embodiment. 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 an exploded perspective view of a main part showing a bearing suspender attached to an inner ring assembly. Fig. 3 is a cross-sectional view of a main part showing a bearing suspender attached to an inner ring. Fig. 4 is an overall perspective view of 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] Additionally, a cylindrical recess 31 is provided on the upper end surface 12d of the inner ring 12 for determining the mounting position of the bearing hanger 20. A more specific configuration of the recess 31 will be described later.

[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 pair of hook portions 22a extending downward from a radially outer end of the base portion 21, and a connecting portion 22b connecting the pair of hook portions 22a. 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] The connecting portion 22b is a recess formed between the pair of hook portions 22a, 22a, and is formed so as to sandwich the axial upper end side of the tapered roller 13 arranged on the raceway surface 12a. As a result, the pair of hook portions 22a, 22a are arranged so as to sandwich the upper portion of the tapered roller 13 on the raceway surface 12a in the circumferential direction.

[0018] The hook portion 22a is bent into a hook shape so as to be able to engage with the small rib portion 12b. The width of the hook portion 22a is formed to be shorter than the gap h2 formed between the tapered rollers 13 arranged at a predetermined interval on the raceway surface 12a. At the tip of the hook portion 22a, an inclined portion 22c is formed that is inclined to match the raceway surface 12a that is continuous with the small rib portion 12b, and a protective cover 17 is provided. This configuration may be seen in Figs. 2 and 3.

[0019] 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 small flange portion 12b. At this time, the locking portion 22 is disposed such that the connecting portion 22b sandwiches the upper portion of the tapered roller 13 on the raceway surface 12a, so that the pair of hook portions 22a are disposed between the tapered rollers 13 arranged side by side on the raceway surface 12a. This prevents the pair of hook portions 22a locked to the small rib portion 12b from interfering with the tapered roller 13. In addition, the shape of the tip of the hook portion 22 a and the protective cover 17 can prevent the locking portion 22 from damaging the raceway surface 12 a of the inner ring 12 .

[0020] 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, the pressing portion 23 b of the eyebolt 23 is fitted into the recess 31 provided in the upper end surface 12 d of the inner ring 12 .

[0021] Next, the recess 31 will be described with reference to FIGS. The recess 31 is formed in a shallow cylindrical shape, into which the pressing portion 23b at the lower end of the eyebolt 23 is fitted. The depth of the recess 31 need only be sufficient to position the pressing portion 23b of the eyebolt 23, and is within the axial thickness of the small flange portion 12b. For this reason, the recess 31 does not reach the vicinity of the raceway surface 12a of the inner ring 12. In other words, the depth of the recess 31 is set so that the recess 31 does not affect the thickness of the inner ring 12 in the radial direction of the raceway surface 12a. This configuration can be seen in FIG. 3. In the illustrated example, three recesses 31 are provided in order to determine the mounting positions of the bearing hangers 20 that are attached to the inner ring 12. The three recesses 31 are disposed at equal intervals around the axis of the inner ring 12. This configuration can be seen in Fig. 4. The number of recesses 31 may be three or more.

[0022] (Action and Effects)

[0023] According to the above-mentioned configuration, in bearing hanger 20, locking portion 22 is locked to small flange portion 12b, 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, bearing hanger 20 can be detachably attached to inner ring 12 by vertically clamping small flange portion 12b between hook portion 22a and pressing portion 23b.

[0024] At this time, the position where bearing hanger 20 is attached and fixed can be determined by forming recess 31 in upper end surface 12d of inner ring 12. In addition, since pressing portion 23b fitted into recess 31 is less likely to shift radially, bearing hanger 20 is more firmly attached to inner ring assembly 10 and less likely to come off. Furthermore, since the recess 31 is formed in a shallow cylindrical shape, the recess 31 does not affect the thickness of the inner ring 12 in the radial direction of the raceway surface 12a, and therefore the strength of the inner ring assembly 10 (tapered roller bearing) can be maintained high even if the recess 31 is formed.

[0025] Second embodiment Next, a second embodiment will be described with reference to Fig. 5. Fig. 5 is a cross-sectional view of a main part showing a bearing hanger attached to an inner ring of the second embodiment. As shown in FIG. 5, the object suspended by bearing suspension tool 40 may be an inner ring (inner ring assembly) 51 that constitutes a cylindrical roller bearing.

[0026] The inner ring assembly has an inner ring (raceway) 51, cylindrical rollers (not shown) which are rolling elements, and a cage (not shown). The inner ring assembly uses an annular cage to arrange a plurality of cylindrical rollers on a raceway surface 51a formed on the outer circumferential surface of the inner ring 51. The inner ring 51 is formed with a pair of flanges 51b, 51c on the outer surface at the upper and lower ends in the axial direction. The bearing suspender 40 is attached and fixed to the upper flange portion 51 b of the inner ring 51 , so that the bearing suspender 40 is disposed above the upper end surface 51 d of the inner ring 51 .

[0027] Further, a cylindrical recess 31 for determining the mounting position of the bearing hanger 40 is provided on an upper end surface 51d of the inner ring 51.

[0028] At this time, the bearing hanger 40 has a base portion 21 , a locking portion 22 , an eyebolt 23 , and a pressure plate 41 . The pressing plate 41 is a plate-like member separate from the eyebolt 23, and is provided on the lower end side of the eyebolt 23. The pressing plate 41 can press the upper end surface 51d of the inner ring 51 by making surface contact with the upper end surface 51d of the inner ring 51 and pressing the upper end surface 51d.

[0029] Further, a fitting portion 42 that protrudes downward is provided on the underside of the pressure plate 41 so as to fit into the recess 31, and the bearing hanger 40 can be smoothly positioned at the installation position. In addition, the pressure plate 41 may be provided with a fastening hole (not shown) for fastening the eyebolt 23 instead of the fitting portion 42 , and the lower end side of the eyebolt 23 may be fitted into the recess 31 .

[0030] 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.

[0031] 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. This allows the outer race assembly to be suspended in a suspended position, similar to the above example.

[0032] The present invention is not limited to the above-described embodiments, and can be modified and improved as appropriate.

[0033] 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 eye bolt is fastened to a vertical bolt hole formed in the base portion; a positioning recess provided in an upper surface of the raceway; a pressing portion provided between the eye bolt and an upper surface of the raceway surface, The pressing portion fits into the recess. Bearing lifting device. According to this configuration, the bearing hoist can stably suspend a large bearing, is constructed at low cost and is compact, and the mounting position of the bearing hoist can be easily determined by low-cost machining of the raceway.

[0034] (2) The bolt hole provided in the base is penetrated in the vertical direction, The lower end side of the eye bolt fastened to the bolt hole is the pressing portion. A bearing hanger as described in (1). With this configuration, the eye bolt serves the functions of engaging the hook member, attaching the bearing hanger to the raceway, and positioning the bearing hanger at a predetermined position on the raceway, thereby reducing the number of parts and keeping manufacturing costs lower.

[0035] (3) The pressing portion has a pressing plate formed as a separate member from the eye bolt. A bearing hanger as described in (1). According to this configuration, the upper surface of the suspended track surface can be more firmly pressed down.

[0036] (4) An assembly suspended by the bearing suspension tool according to any one of (1) to (3), The recesses are provided in three or more numbers and are 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.

[0037] (5) The depth of the recess is within the axial thickness of the axially upper flange portion. The bearing according to (4). According to this configuration, the thickness of the inner ring in the radial direction of the raceway surface is not reduced by the recess, so the strength of the bearing can be maintained high. [Explanation of symbols]

[0038] 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 22b Connection part 22c Slope 23 Eyebolt 23a Ring section 23b Pressing part 31 Recess h1 Gap h2 Gap 40 Bearing lifting device 41 Pressure plate 42 Fitting part 51 Inner ring (raceway, bearing ring) 51a Raceway surface 51b Upper end side flange 51c Lower end side flange 51d Top surface

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 eye bolt is fastened to a vertical bolt hole formed in the base portion; a positioning recess provided in an upper surface of the raceway; a pressing portion provided between the eye bolt and an upper surface of the raceway surface, The pressing portion fits into the recess. Bearing lifting device.

2. The bolt hole provided in the base portion is penetrated in the vertical direction, The lower end side of the eye bolt fastened to the bolt hole is the pressing portion.

2. The bearing hanger of claim 1.

3. The pressing portion has a pressing plate made of a separate member from the eye bolt.

2. The bearing hanger of claim 1.

4. An assembly suspended by the bearing suspension tool according to any one of claims 1 to 3, The recesses are provided in three or more numbers and are arranged at equal intervals around the axis of the raceway. Bearing.

5. The depth of the recess is within the axial thickness of the axially upper flange portion.

5. A bearing according to claim 4.

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