Bearing suspension tool

Abstract

To provide a bearing suspension tool that enables a large bearing to be suspended without machining, the bearing lifting tool being configured at a low cost and in a compact form.SOLUTION: A bearing suspension tool is capable of suspending, in a suspended posture in which the axial direction is oriented vertically, an assembly including: a rolling element composed of a conical roller or a cylindrical roller; and a race ring having a raceway surface formed using a retainer to dispose the rolling element between flange portions arranged on both axial sides. The bearing suspension tool includes: a base portion that faces the upper surface of the race ring; a locking portion that extends downward from the base portion and is locked to the flange portion; and an eye bolt that is fastened to a screw hole in the vertical direction formed in the base portion and has a pressing portion that is pressed against the upper surface of the raceway surface. The locking portion is locked to the flange portion at a gap formed between adjacent rolling elements.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a bearing suspender that suspends an assembly that constitutes 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 with a chain or the like, 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 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 low-cost and compact, and can hang large bearings without any processing. [Means for solving the problem]

[0007] The above object of the present invention can be achieved by the following configuration. (1) A bearing hoist capable of suspending an assembly having rolling elements each consisting of a tapered roller or a cylindrical roller, and a raceway ring having a raceway surface on which the rolling elements are arranged by using a cage between flanges 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 having a pressing portion that is fastened to a vertical screw hole formed in the base and pressed against an upper surface of the raceway surface, The locking portion is locked to the flange portion through a gap formed between adjacent rolling elements. Bearing lifting device. Effect of the Invention

[0008] According to the present invention, a bearing suspender that can suspend a large bearing without processing it can be configured to be low cost and compact. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a bearing suspending mechanism equipped with a bearing suspender according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of a main portion showing a bearing hanger attached to an inner ring assembly. FIG. [Diagram 3] FIG. 3 is a front view of a main portion showing a bearing hanger attached to an inner ring assembly. [Figure 4] FIG. 4 is a side cross-sectional view of a main portion showing a bearing hanger attached to an inner ring assembly. [Diagram 5] FIG. 5 is a main portion front view showing a bearing hanger of the second embodiment attached to an inner ring assembly. [Figure 6] FIG. 6 is a side cross-sectional view of a main portion showing a bearing hanger of a third embodiment attached to a bearing. [Figure 7] FIG. 7 is a perspective view of a main portion showing a bearing hanger of a fourth embodiment attached to an inner ring assembly. [Figure 8] FIG. 8 is a side cross-sectional view of a main portion showing a bearing hanger of a fourth embodiment attached to an inner ring assembly. 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 equipped with a bearing suspender according to one embodiment of the present invention. Fig. 2 is a perspective view of a main part showing the bearing suspender attached to an inner ring assembly. Fig. 3 is a front view of a main part showing the bearing suspender attached to an inner ring assembly. Fig. 4 is a side cross-sectional view of a main part showing the bearing suspender attached to an inner ring assembly.

[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 in order to perform the task of fitting the inner ring assembly 10 into a rotating shaft (not shown). 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 made of a chain or rope that connects between a lifting means such as a crane and the bearing hangers 20, and a hook member 3 that engages with each of the bearing hangers 20 is attached and fixed to one end.

[0013] The inner ring assembly 10 has an inner ring (raceway ring) 12, tapered rollers 13 which are rolling elements, and a cage 14. The inner ring assembly 10 uses an annular cage 14 to arrange a plurality of tapered rollers 13 side by side on a raceway surface 12a formed on the outer circumferential surface of the inner ring 12. Positioning holes 14a are formed in the cage 14 for arranging the tapered rollers 13 side by side along the raceway surface 12a. This configuration can be seen in Figures 1 and 2. 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] (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.

[0015] 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.

[0016] 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. This configuration may be seen in FIG. 3.

[0017] 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. 3 and 4.

[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 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 .

[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 by providing pressing plate 25, preventing the contact surface pressure from becoming high at a specific point. This configuration can be seen in FIG. 4. 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] According to the above-mentioned configuration, by engaging portion 22 with small flange portion 12b, bearing hanger 20 is positioned above the upper end surface of inner ring 12, and then upper end surface 12d of inner ring 12 is pressed downward by pressing portion 23b of eyebolt 23. That is, by vertically clamping small flange portion 12b between hook portion 22a and pressing portion 23b, bearing hanger 20 can be detachably attached to inner ring 12. Also, bearing hanger 20 can be reliably fixed to a predetermined position on inner ring 12. According to the above, the bearing hanger 20 can be attached to the inner race 12 without processing the inner race assembly 10, and the inner race assembly 10 can be hung in a hanging position.

[0021] 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.

[0022] 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.

[0023] Second embodiment Next, a second embodiment of the bearing hanger 20 will be described with reference to Fig. 5. Fig. 5 is a main part front view showing the bearing hanger of the second embodiment attached to an inner ring assembly.

[0024] The bearing hanger 20 has a base 21, a locking portion 22, and an eyebolt 23. The locking portion 22 has a single hook portion 31 extending downward from the radially outer end of the base portion 21 .

[0025] The hook portion 31 is disposed at the circumferential center of the base portion 21, and is bent into a hook shape so as to be able to be engaged with the small flange portion 12b. The width of the hook portion 31 is formed to be shorter than the gap h2 formed between the tapered rollers 13 arranged at predetermined intervals on the raceway surface 12a. According to this configuration, by making the hook portion 31 of the locking portion 22 a single piece, when the bearing hanger 20 is arranged at equal intervals around the axis of the inner ring assembly 10, the hook portion 31 can easily lock into the gaps formed between adjacent tapered rollers 13, regardless of the arrangement interval of the tapered rollers 13. In other words, the hook portion 31 can be locked onto various types of inner ring assemblies 10 in which the width between adjacent tapered rollers 13 differs, improving versatility.

[0026] Third embodiment Next, a third embodiment of the bearing hanger 20 will be described with reference to Fig. 6. Fig. 6 is a side cross-sectional view of a main portion of the bearing hanger of the third embodiment attached to a bearing.

[0027] The bearing hanger 20 has a base 21, a locking portion 22, and an eyebolt 23. The base portion 21 is a plate-like or block-like member disposed on the upper end surface 12d of the inner ring 12. The base 21 is provided with an extension 33 extending radially inward beyond the inner edge of the upper end face 12d of the inner ring 12. A through hole 33a is formed in the extension 33 penetrating in the up-down direction, and a restriction pin 32 is fastened to the through hole 33a. In other words, the through hole 33a is provided at a position that does not overlap with the inner ring 12 in a plan view.

[0028] By adjusting the vertical length of the regulating pin 32, the lower end side of the regulating pin 32 protruding below the base 21 is positioned radially inward of the inner circumferential surface of the inner ring 12 and lower than the upper end surface of the inner ring 12. According to this configuration, by providing the restriction pin 32 after the bearing hanger 20 is attached and fixed to the inner ring 12, the locking portion 22 and the restriction pin 32 are arranged to sandwich the small flange portion 12b in the radial direction. Therefore, it is possible to prevent the bearing hanger 20 attached to the inner ring 12 from shifting radially and coming off.

[0029] (Fourth embodiment) Next, a fourth embodiment of a bearing hanger 20 for suspending an inner ring assembly 50 constituting a cylindrical roller bearing will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is a perspective view of a main portion of the bearing hanger of the fourth embodiment attached to an inner ring assembly. Fig. 8 is a side cross-sectional view of a main portion of the bearing hanger of the fourth embodiment attached to an inner ring assembly.

[0030] The inner ring assembly 50 has an inner ring 15, cylindrical rollers 16, and a cage (not shown). In the inner ring assembly 50, the cylindrical rollers 16 are arranged side by side on a raceway surface 15a formed on the outer circumferential surface of the inner ring 15 using a cage (not shown). The inner ring 15 has crank-shaped flanges 15b, 15c at both axial ends. An annular raceway surface 15a is formed on the inner peripheral surface of the inner ring 15 along the axial direction of the inner ring 15. The bearing suspender 40 is engaged with the axially upper flange 15b of the inner ring 15, so that the bearing suspender 40 is easily attached to the upper side of the upper end surface 15d of the inner ring 15.

[0031] The bearing hanger 40 has a base 21, a locking portion 42, and an eyebolt 23. A locking portion 42 that extends downward and is locked to the flange portion 15b of the inner ring 15 is integrally formed on the radially outer side of the base portion 21.

[0032] The locking portion 42 has a pair of hook portions 42a extending downward from a radially outer end of the base portion 21, and a connecting portion 42b connecting the pair of hook portions 42a.

[0033] The hook portion 42a is bent into an L-shape to conform to the shape of the flange portion 15b, and is thereby engaged with the flange portion 15b of the inner ring 15. The hook portion 42a is also formed so as to be engageable with a gap formed between the cylindrical rollers 16 arranged side by side at a predetermined interval on the raceway surface 15a. The tip of the hook portion 42a extends to the vicinity of the raceway surface 15a that is continuous with the flange portion 15b, and a protective cover 17 that protects the raceway surface 15a is provided on the tip of the hook portion 42a. This configuration can be seen in FIG.

[0034] According to the above-described configuration, the inner ring 15 to which the bearing lifting device 40 is removably attached can be lifted using a wire and a crane, thereby suspending the inner ring assembly 50, or a cylindrical roller bearing with the outer ring assembled to the inner ring assembly 50, in a suspended position.

[0035] The present invention is not limited to the above-described embodiments, and can be modified and improved as appropriate.

[0036] As described above, the present specification discloses the following: (1) A bearing hoist capable of suspending an assembly having rolling elements each consisting of a tapered roller or a cylindrical roller, and a raceway ring having a raceway surface on which the rolling elements are arranged by using a cage between flanges 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 having a pressing portion that is fastened to a vertical screw hole formed in the base and pressed against an upper surface of the raceway surface, The locking portion is locked to the flange portion through a gap formed between adjacent rolling elements. Bearing lifting device. According to this configuration, a bearing suspender that suspends an assembly that constitutes a large bearing without processing the assembly can be configured to be low cost and compact.

[0037] (2) The locking portion has a pair of hook portions arranged to sandwich the rolling element. A bearing hanger as described in (1). According to this configuration, the pair of hook portions can be disposed so as not to interfere with the rolling elements.

[0038] (3) The engaging portion has a single hook portion. A bearing hanger as described in (1). According to this configuration, the present invention can be applied even when the sizes of the rolling elements are different, thereby improving versatility.

[0039] (4) The base portion has an extension portion that protrudes in a radial direction from an upper surface of the raceway, and a restriction body that is inserted into a through hole that passes through the extension portion in a vertical direction, The regulating body is disposed so as to sandwich the raceway ring between the regulating body and the locking portion in the radial direction. A bearing hanger according to any one of (1) to (3). According to this configuration, the bearing hanger attached to the raceway is less likely to come off in the radial direction.

[0040] (5) Three or more bearings are attached to the raceway and are arranged at equal intervals around the axis of the raceway. A bearing hanger according to any one of (1) to (4). According to this configuration, the raceway ring suspended in the suspended position becomes more stable. [Explanation of symbols]

[0041] 2 Wire 3 Hook member 10 Inner ring assembly (assembly) 12 Inner ring (raceway, bearing ring) 12a Raceway surface 12b Small flange (flange) 12c Tsubabe 12d Top surface 13 Tapered roller 14 Cage 15 Inner Circle 15a Raceway surface 15b Tsubabe 15c Tsubabe 15d Top surface 17 Protective cover 20 Bearing hanger 21 Base 21a Bolt hole 22,42 Locking part 22a Hook part 22b Connection part 22c Slope 23 Eyebolt 23a Ring section 23b Pressing part 25 Pressure plate 31 Hook part 32 Regulating pin (regulating body) 33 Extension section 33a Through hole 40 Bearing lifting device 42a Hook part 42b Connection part 50 Inner ring assembly (assembly) h1 Gap h2 Gap

Claims

1. A bearing suspender capable of suspending an assembly having rolling elements each consisting of a tapered roller or a cylindrical roller, and a raceway ring having a raceway surface on which the rolling elements are arranged by using a cage between flanges 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 having a pressing portion that is fastened to a vertical screw hole formed in the base and pressed against an upper surface of the raceway surface, The locking portion is locked to the flange portion through a gap formed between adjacent rolling elements. Bearing lifting device.

2. The locking portion has a pair of hook portions arranged to sandwich the rolling element.

2. The bearing hanger of claim 1.

3. The locking portion has a single hook portion.

2. The bearing hanger of claim 1.

4. the base portion has an extension portion that protrudes radially from an upper surface of the raceway, and a restriction body that is inserted into a through hole that passes through the extension portion in a vertical direction, The regulating body is disposed so as to sandwich the raceway ring between the regulating body and the locking portion in the radial direction.

2. The bearing hanger of claim 1.

5. Three or more of the bearings are attached to the raceway and are arranged at equal intervals around the axis of the raceway.

2. The bearing hanger of claim 1.

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