Bearing suspension device and bearing

Abstract

To provide a bearing suspension device for suspending a large bearing in order to incorporate the bearing into a rotating shaft, which is configured to be low-cost and compact, and capable of maintaining high strength of the bearing, and the bearing.SOLUTION: A bearing suspension device is detachably attached to the outer ring of the bearing and suspends the bearing in a suspended position with the axial direction facing up and down. The bearing suspension device is U-shaped and has a lower part arranged below the outer ring, an upper part arranged above the outer ring, and a vertical connecting part connecting the lower and upper parts. The lower part has a support part that supports the lower end surface of the outer ring. The upper part is provided with an end face pressing bolt that is fastened to a vertical bolt hole and presses the upper end surface of the outer ring at its lower end. The upper part or the connecting part is provided with an eye bolt that is fastened to a vertical fixing hole. The connecting part is provided with a fall prevention bolt that is fastened to a radial bolt hole and presses the outer peripheral surface of the outer ring.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 with a chain or the like, and hoisting the large rolling bearing with a crane.

[0003] Patent Document 2 discloses a hanging device for suspending a rolling bearing, which comprises an annular fixed member to which a hanging ring can be attached, and a claw-shaped member fixed to this fixed member, and by engaging this claw-shaped member with an axially facing surface of a component part of the rolling bearing, a method for suspending a large, heavy rolling bearing without providing bolt holes in the bearing side. [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 providing bolt holes on the bearing side, but because a claw-shaped member is attached to a fixing member formed in a ring shape along the top surface of the bearing, the entire device becomes large, which poses the problem of increased effort and cost in manufacturing and storage.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a bearing hanger and a bearing that suspends a large bearing so as to incorporate the bearing into a rotating shaft, which can configure the bearing hanger to be low-cost and compact, while maintaining high strength of the bearing. [Means for solving the problem]

[0007] The above object of the present invention can be achieved by the following configuration. (1) A bearing suspender that is detachably attached to an outer ring of a bearing and suspends the bearing in a suspended position with its axial direction facing up and down, a lower portion disposed below the outer ring, an upper portion disposed above the outer ring, and a vertical connecting portion connecting the lower portion and the upper portion, the lower portion being formed in a U-shape; the lower portion has a support portion that supports a lower end surface of the outer ring, An end face pressing bolt is provided in the upper portion, the end face pressing bolt being fastened to a vertical bolt hole and pressing an upper end face of the outer ring at a lower end side. The upper portion or the connecting portion is provided with an eyebolt fastened to a vertical fixing hole, The connecting portion is provided with a drop-out prevention bolt that is fastened to a radial bolt hole and presses the outer peripheral surface of the outer ring. Bearing lifting device. (2) A bearing that is lifted by the bearing lifting tool described in (1), The bearing comprises an outer ring, an inner ring, and a plurality of cylindrical rollers disposed on raceway surfaces formed on the outer ring and the inner ring, a notch through which the support portion is inserted is provided on a lower end surface of the outer ring, At least three of the notches are disposed on the lower end surface of the outer ring and are disposed at equal intervals around the axis of the bearing. Bearing. Effect of the Invention

[0008] According to the present invention, in a bearing suspender and bearing used to suspend a large bearing so as to incorporate the bearing into a rotating shaft, the bearing suspender that suspends the bearing in a stably state can be constructed at low cost and in a compact manner while maintaining the strength of the bearing 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 a bearing 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 a bearing. [Diagram 3] FIG. 3 is a side cross-sectional view of a main portion showing a bearing hanger attached to a bearing. [Figure 4] FIG. 4 is a bottom view of the bearing. [Diagram 5] FIG. 5 is a bottom perspective view of the main part showing the cutout portion of the bearing. [Figure 6] FIG. 6 is a diagram showing the assembly process. [Figure 7] FIG. 7 is a diagram showing the removal process. [Figure 8] FIG. 8 is a side cross-sectional view of a main portion showing a bearing hanger attached to a bearing of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The configuration of the bearing hoisting mechanism to which the bearing hoisting tool and bearing of the present invention are applied will be described below with reference to the attached drawings. Each figure 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 posture of the bearing refers to a state in which the axial direction of the bearing is oriented in the vertical 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 hoisting mechanism including a bearing hoist and a bearing according to an embodiment of the present invention. Fig. 2 is a perspective view of the main part showing the bearing hoist attached to the bearing. Fig. 3 is a side cross-sectional view of the main part showing the bearing hoist attached to the bearing.

[0012] 1 includes a bearing 10, multiple bearing hoisting tools 20, a wire 2, and a lifting means (not shown) consisting of a crane or the like. The bearing hoisting mechanism 1 suspends the bearing 10 in a suspended position via the lifting means and the wire 2, and performs the task of installing the bearing 10 onto a predetermined rotating shaft 30. At least three bearing hoists 20 are detachably attached to the bearing 10, and each of the bearing hoists 20 is disposed at equal intervals around the axis of the bearing 10. In the example shown, three bearing hoists 20 are attached to the bearing 10. The wire 2 is a connector made of a chain or rope that connects the hoisting means, such as a crane, to the bearing hoists 20, and has a hook member 3 attached and fixed to one end thereof to be engaged with each of the bearing hoists 20.

[0013] Bearing 10 is a cylindrical roller bearing having an outer ring 11, an inner ring 12, cylindrical rollers 13, and a retaining ring 14. Bearing 10 is a full complement bearing in which a plurality of cylindrical rollers 13 are arranged side by side between raceway surface 11a formed on the inner peripheral surface of outer ring 11 and raceway surface 12a formed on the outer peripheral surface of inner ring 12, without using a cage. For this reason, bearing 10 needs to be handled as a single unit with outer ring 11, inner ring 12, and cylindrical rollers 13. The inner ring 12 has a pair of shoulders 12b on both axial sides. The outer ring 11 has a shoulder 11e on one axial side that protrudes radially inward from the raceway surface 11a, while the other axial side is composed of a cylindrical surface that continues from the raceway surface 11a, and an annular groove 11f is formed in part of the cylindrical surface to which a retaining ring 14 is attached. The retaining ring 14 extends radially from the outer ring 11 to the inner ring 12 by being attached by being inserted into the annular groove 11f. With this configuration, the cylindrical rollers 13 are prevented from coming out in one axial direction (upward) by the shoulder 11e of the outer ring 11 and the shoulder 12b on one axial direction of the inner ring 12. On the other hand, the cylindrical rollers 13 are prevented from coming out in the other axial direction (downward) by the shoulder 12b on the other axial direction of the inner ring 12 and the retaining ring 14 on the outer ring 11 side. This configuration can be seen in Fig. 3. The specific configuration of the outer ring 11 of the bearing 10, to which the bearing hanger 20 is detachably attached, will be described later. Incidentally, the bearing 10 may be one that uses a cage (not shown).

[0014] (Bearing hanger 20)

[0015] The bearing hanger 20 has a lower part 21, an upper part 22, and a connecting part 23. The bearing hanger 20 is disposed on the outer peripheral surface side of the bearing 10, and is formed in a U-shape with an open inner side so as to sandwich the outer ring 11 in the vertical direction. This configuration can be seen in Figures 1 to 3.

[0016] The lower part 21 is a plate-like member extending radially inward from the lower end side of the connecting part 23 toward the axis of the bearing 10, and has a support part 24 that supports the outer ring 11 from below. The support portion 24 has a first step portion 24a, a second step portion 24c, and a return portion 24b. The second step portion 24c is provided radially inward of the first step portion 24a, and the return portion 24b is provided at the radially inner end portion of the support portion 24. This configuration may be seen in FIG. 3.

[0017] The first step portion 24a has an inward surface facing radially inward, which is formed by providing a downward recess in the upper surface of the support portion 24. The inward surface of the first step portion 24a is curved in an arc shape so as to abut along the outer peripheral surface 11d of the outer ring 11. The barbed portion 24b is a hook portion formed by bending the radial tip side of the support portion 24 upward. The second step 24c is formed on the upper surface of the support portion 24 recessed by the first step 24a. The second step 24c is a step formed lower than the first step 24a by thickening a part of the radially inner side of the first step 24a, and an outward surface facing radially outward is formed. The outward surface of the second step 24c is curved so as to be an arc shape along the raceway surface 11a of the outer ring 11. According to this configuration, the support portion 24 can support the lower end surface 11c of the outer ring 11 between the first step portion 24a and the second step portion 24c. Moreover, the support portion 24 can support the lower end surface of the cylindrical roller 13 by the return portion 24b. Moreover, the outer ring 11 supported by the support portion 24 has radial movement of the bearing 10 restricted by the second step portion 24c and, more specifically, by the fall-off prevention bolt 28 described later. This allows the bearing 10 to be suspended more stably.

[0018] The upper part 22 is a plate-like member extending radially inward from the upper end side of the connecting part 23 toward the axis of the bearing 10, and is disposed above the upper end surface 11b of the outer ring 11. A bolt hole 22a penetrating in the vertical direction is formed on the radial tip side of the upper part 22, and a vertical end face holding bolt 26 is fastened to the bolt hole 22a.

[0019] The vertical position of the end face pressing bolt 26 can be adjusted by adjusting the amount of fastening into the bolt hole 22a of the upper portion 22. That is, the lower end side of the end face pressing bolt 26 can press the upper end face 11b of the outer ring 11 downward. A pressure plate (not shown) may be provided between the lower end of the end face pressing bolt 26 and the upper end face 11 b of the outer ring 11 . According to this configuration, by clamping the outer ring 11 vertically between the support portion 24 and the end face holding bolt 26, the bearing hanger 20 can be detachably attached to the bearing 10 side (outer ring 11). In addition, by interposing a pressure plate between the end face pressing bolt 26 and the upper end face 11b of the outer ring 11 to achieve surface contact, the mounting state of the bearing hanger 20 to the bearing 10 can be made more stable.

[0020] The connecting portion 23 is a plate-like member extending in the vertical direction so as to connect the lower portion 21 and the upper portion 22. The plate-like lower portion 21 is fixed to the lower end side of the connecting portion 23 by bolts, welding, etc., and the plate-like upper portion 22 is fixed to the upper end side of the connecting portion 23 by bolts, welding, etc. A fixing hole 23a is formed in the upper surface of the connecting portion 23, penetrating in the vertical direction, and an eyebolt 27 is fixed in the fixing hole 23a. A bolt hole 23b is formed in the middle of the connecting portion 23 in the vertical direction, penetrating in the radial direction, and a drop-out prevention bolt 28 is fastened in the bolt hole 23b.

[0021] The eye bolt 27 is a bolt having a ring portion 27a formed at its head to which the hook member 3 is engaged, and is also called a hanging bolt. The eyebolt 27 is fixed to the fixing hole 23a on the upper surface of the connecting portion 23, so that the ring portion 27a is disposed above the connecting portion 23 and radially outside the end face pressing bolt 26. This configuration can be seen in Figs. 1 to 3.

[0022] The radial position of the fall-off prevention bolt 28 can be adjusted by adjusting the amount of fastening into the bolt hole 23b of the connecting portion 23. That is, the radially inner end of the fall-off prevention bolt 28 can press the outer circumferential surface 11d of the outer ring 11 toward the axial center of the bearing 10. The fall-off prevention bolt 28 is also referred to as an outer surface pressing bolt 28. According to this configuration, by pressing the outer peripheral surface 11d of the outer ring 11 with the fall-off prevention bolt 28, it is possible to more reliably bring the second step portion 24c of the support portion 24 into surface contact with the raceway surface 11a of the outer ring 11. This prevents the bearing 10 suspended by the bearing hanger 20 from shifting in the radial direction, and also prevents the bearing 10 from slipping in the circumferential direction and rotating about its axis. This makes the bearing 10 suspended in the suspended position by the bearing hanger 20 more stable.

[0023] The above-described bearing hanger 20 may be configured such that the lower portion 21, the upper portion 22, and the connecting portion 23 are integrally molded rather than being separate members. Further, eyebolt 27 is attached to the upper surface side of connecting portion 23, but it may be provided on upper portion 22 side.

[0024] (Outer ring 11) Next, a specific configuration of the outer ring 11 to which the bearing hanger 20 is detachably attached will be described with reference to Fig. 1 to Fig. 5. Fig. 4 is a bottom view of the bearing. Fig. 5 is a bottom perspective view of the main part showing the cutout portion of the bearing. The outer ring 11 has an upper end face 11b on one axial side having a shoulder portion 11e pressed by an end face pressing bolt 26, a lower end face 11c on the other axial side having an annular groove 11f supported from below by a support portion 24, and an outer peripheral surface 11d pressed by an anti-fall-off bolt 28. The lower end face 11c of the outer ring 11 is cut out from the annular groove 11f to the axial end face side, and is provided with a plurality of notches 15 through which support parts 24 of the bearing hanger 20 are inserted.

[0025] The cutout portion 15 is recessed upward from the lower end surface 11c of the outer ring 11 and is formed so as to cross the lower end surface 11c of the outer ring 11 in the radial direction, so that the support portion 24 is inserted therethrough. In the illustrated example, six notches 15 are provided, and the notches 15 are disposed at equal intervals around the axis of the bearing 10. This configuration can be seen in Fig. 4. The number of notches 15 is not limited to six, and may be three or more. The notch 15 is formed to a depth that allows the support portion 24 to be inserted and removed, but does not reach the lower end of the track surface 11a. This configuration can be seen in FIGS.

[0026] According to this configuration, by inserting the support portion 24 into the cutout portion 15, the position where the support portion 24 supports the lower end surface 11c of the outer ring 11 can be smoothly and easily determined. As a result, multiple bearing hangers 20 (three in the illustrated example) can be arranged at equal intervals around the axis of the bearing 10, so that the bearing 10 can be hung in a more stable state. Furthermore, since the depth of the cutout portion 15 is greater than the thickness of the support portion 24, the support portion 24 can be inserted and removed from the cutout portion 15 even when the bearing 10 is placed on the ground, thereby improving convenience.

[0027] (Bearing installation method) Next, a method of assembling a bearing, in which a large bearing is lifted and assembled into a rotating shaft, will be described with reference to Figures 6 and 7. Figure 6 shows the assembly process, and Figure 7 shows the removal process.

[0028] The method of assembling the bearing 10 onto the rotating shaft 30 using the above-mentioned bearing hanger 20 and bearing 10 includes an attachment step, an assembling step, and a removal step.

[0029] In the mounting step in the above embodiment, a plurality of (three in this embodiment) bearing hangers 20 are mounted on the axis of the bearing 10 at equal intervals. More specifically, first, the support portion 24 is inserted into the cutout portion 15 of the outer ring 11 and positioned so that the support portion 24 supports the cutout portion 15 from below. Next, the vertical position of the end face pressing bolt 26 is adjusted to press the upper end face 11b of the outer ring 11, thereby clamping the outer ring 11 in the vertical direction. Next, the radial position of the fall-off prevention bolt 28 is adjusted to press the outer peripheral surface 11d of the outer ring 11 radially inward. In this manner, the bearing hanger 20 can be attached and fixed to the bearing 10 in a predetermined position. This configuration can be seen in FIGS. 1 to 3. As described above, by providing the cutout portion 15 in the bearing 10, the support portion 24 can be easily inserted into the lower end surface of the outer ring 11 even when the bearing 10 is placed on the ground, and the three bearing hangers 20 can be attached in accurate mounting positions.

[0030] In the installation process, first, the hook member 3 provided on one end of the wire 2 is engaged with the eyebolt 27 of the bearing hoist 20, and the bearing 10 is hoisted by a hoisting means such as a crane connected to the other end of the wire 2. In this way, the bearing 10 is suspended in a suspended position. At this time, the support portion 24 is formed so that, with the upper surface of the first step portion 24a in contact with the lower end surface 11c of the cutout portion 15, the upper surface of the return portion 24b advances axially inward beyond the retaining ring 14 and can abut against the cylindrical roller 13. As described above, the support portion 24 can also support the cylindrical roller 13 and the inner ring 12 and the cylindrical roller 13 via the shoulder portion 12b. Incidentally, in the case where the bearing 10 suspended by the bearing hanger 20 is equipped with a cage, the return portion 24b comes into contact with the cage (not shown) so as to support the cage from below.

[0031] Next, in the assembly process, the bearing 10 or the rotating shaft 30 is moved, so that the rotating shaft 30 is positioned vertically on the axis of the bearing 10 suspended in a suspended position. Next, the bearing 10 is lowered toward the rotating shaft 30, and the bearing 10 (the inner peripheral surface of the inner ring 12) is fitted into the mounting portion 31 of the rotating shaft 30. This makes it possible to mount the bearing 10 on the rotating shaft 30. This configuration may be seen in FIG. 6.

[0032] The removal process involves loosening (removing) the end face clamp bolts 26 and the anti-fall-out bolts 28 to release the fixed state of the bearing hanger 20 to the outer ring 11, and then sliding the bearing hanger 20 radially outward to remove it from the bearing 10 assembled to the rotating shaft 30. At this time, since the support portion 24 can be pulled out from the notch portion 15 formed in the lower end surface 11c of the outer ring 11, the bearing hanger 20 can be smoothly removed from the bearing 10. This configuration can be seen in FIG.

[0033] 6 and 7, the rotating shaft 30 is formed with a shaft shoulder 32 that abuts only against the lower end surface of the inner ring 12 fitted into the mounting portion 31. As a result, a gap h corresponding to the height of the shaft shoulder 32 is formed between the rotating shaft 30 and the lower end surface 11c of the outer ring 11 of the bearing 10 mounted on the rotating shaft 30. Accordingly, the cutout 15 formed in the outer ring 11 is formed so that its vertical length (depth) is longer than the value obtained by subtracting the height h of the shaft shoulder 32 from the thickness of the support part 24. This makes it easier to remove the bearing hanger 20 from the bearing 10 mounted on the rotating shaft 30, while also ensuring freedom in designing the rollers of the bearing 10. Furthermore, even if there is no gap h due to the shaft shoulder portion 32 in the rotating shaft 30, the support portion 24 can be removed from the cutout portion 15 by rotating the bearing hanger 20 upward (in the example shown in Figure 7, rotating counterclockwise) and pulling it out.

[0034] In this embodiment, three bearing hoisting devices 20 are detachably attached to the bearing 10, so that a large bearing 10 used in a wind turbine for wind power generation or an excavation device can be hung in a more stable state by a crane. This allows the work of assembling the bearing 10 onto the rotating shaft 30 to be performed more smoothly, and the bearing hoisting device 20 can be configured compactly and at low cost.

[0035] Second embodiment Another embodiment of a cylindrical roller bearing 10 that can be suspended by a bearing hanger 20 will be described with reference to Fig. 8. Fig. 8 is a side cross-sectional view of a main portion showing a bearing hanger attached to a bearing of the second embodiment.

[0036] In the above example, the bearing suspended by the bearing hanger 20 is a cylindrical roller bearing 10 formed by a double-ribbed inner ring 12 having shoulders 12b, 12b formed at both axial ends, and an upper-ribbed outer ring 11 having a shoulder 11e formed at its upper axial end, but any cylindrical roller bearing 10 that can be suspended by the above-mentioned bearing hanger 20 can be used, and is not limited to the above configuration.

[0037] For example, the bearing suspended by the bearing hanger 20 may be a cylindrical roller bearing 10A formed by an upper rib inner ring 12A having a shoulder 12b formed at its upper axial end, and a double rib outer ring 11A having shoulders 11e formed on both axial ends, as shown in Figure 8. The outer ring 11A has a pair of shoulders 11e, 11e on both axial sides. The inner ring 12A has a shoulder 12b on one axial side that protrudes radially outward from the raceway surface 12a, while the other axial side is formed by a cylindrical surface that continues from the raceway surface 12a, and an annular groove 12c is formed in part of the cylindrical surface in which a retaining ring 14 is attached. The retaining ring 14 is attached by being inserted into the annular groove 12c on the inner ring 12 side, and extends in the radial direction from the inner ring 12A toward the outer ring 11A.

[0038] The present invention is not limited to the above-described embodiments, and can be modified and improved as appropriate.

[0039] As described above, the present specification discloses the following: (1) A bearing suspender that is detachably attached to an outer ring of a bearing and suspends the bearing in a suspended position with its axial direction facing up and down, a lower portion disposed below the outer ring, an upper portion disposed above the outer ring, and a vertical connecting portion connecting the lower portion and the upper portion, the lower portion being formed in a U-shape; the lower portion has a support portion that supports a lower end surface of the outer ring, An end face pressing bolt is provided in the upper portion, the end face pressing bolt being fastened to a vertical bolt hole and pressing an upper end face of the outer ring at a lower end side. The upper portion or the connecting portion is provided with an eyebolt fastened to a vertical fixing hole, The connecting portion is provided with a drop-out prevention bolt that is fastened to a radial bolt hole and presses the outer peripheral surface of the outer ring. Bearing lifting device. According to this configuration, the bearing hanger can be constructed at low cost and in a compact manner, the bearing hung by the bearing hanger can be prevented from rotating about its axis, and the hanging posture of the bearing can be made more stable.

[0040] (2) The support portion is formed with a step portion that comes into contact with the raceway surface of the outer ring. A bearing hanger as described in (1). According to this configuration, the bearing to which the bearing hanger is attached can be restricted from moving in the radial direction.

[0041] (3) The support portion has a return portion formed by bending the tip upward. A bearing hanger as described in (1) or (2). According to this configuration, the bearing to which the bearing hanger is attached can be restricted from moving radially inward.

[0042] (4) Three or more are attached to the outer ring and are arranged at equal intervals around the axis of the bearing. A bearing hanger according to any one of (1) to (3). According to this configuration, the hanging posture of the bearing hung by the bearing hanger is stabilized.

[0043] (5) A bearing that is lifted by the bearing lifting tool according to any one of (1) to (4), The bearing comprises an outer ring, an inner ring, and a plurality of cylindrical rollers disposed on raceway surfaces formed on the outer ring and the inner ring, a notch through which the support portion is inserted is provided on a lower end surface of the outer ring, At least three of the notches are disposed on the lower end surface of the outer ring and are disposed at equal intervals around the axis of the bearing. Bearing. According to this configuration, the attachment position of the support portion that supports the outer ring can be smoothly and easily determined.

[0044] (6) The axially lower end of the inner ring is placed on a shaft shoulder formed on the axially lower end of the rotating shaft to be fitted thereto, The depth of the notch is greater than the difference between the axial thickness of the support portion and the height of the shaft shoulder portion. A bearing as described in (5). According to this configuration, the depth of the notch can be minimized, which prevents the strength of the bearing from decreasing and increases the design freedom of the roller length of the bearing. [Explanation of symbols]

[0045] 1 Bearing suspension mechanism 2 Wire 3 Hook member 10. Bearings 11 Outer ring 11a Raceway surface 11b Upper end surface 11c Lower end surface 11d Outer surface 12 Inner Circle 12a Raceway surface 15 Notch 20 Bearing hanger 21 Lower 22 Upper 22a Bolt hole 23 Connecting part 23a Fixing hole 23b Bolt hole 24 Support part 24a 1st stage 24b Return part 24c 2nd stage section (step section) 26 End cap bolt 27 Eyebolt 27a Ring section 28 Anti-fall bolt 30 Rotational Axis 31 Assembly section 32 Shaft shoulder h Gap

Claims

1. A bearing suspender that is detachably attached to an outer ring of a bearing and suspends the bearing in a suspended position with an axial direction facing up and down, a lower portion disposed below the outer ring, an upper portion disposed above the outer ring, and a vertical connecting portion connecting the lower portion and the upper portion, the lower portion being formed in a U-shape; the lower portion has a support portion that supports a lower end surface of the outer ring, An end face pressing bolt is provided in the upper portion, the end face pressing bolt being fastened to a vertical bolt hole and pressing an upper end face of the outer ring at a lower end side. The upper portion or the connecting portion is provided with an eyebolt fastened to a vertical fixing hole, The connecting portion is provided with a drop-out prevention bolt that is fastened to a radial bolt hole and presses the outer peripheral surface of the outer ring. Bearing lifting device.

2. The support portion is formed with a step portion that comes into contact with the raceway surface of the outer ring.

2. The bearing hanger of claim 1.

3. The support portion has a return portion formed by bending the tip upward.

2. The bearing hanger of claim 1.

4. Three or more of the bearings are attached to the outer ring and are arranged at equal intervals around the axis of the bearing.

2. The bearing hanger of claim 1.

5. A bearing that is lifted by the bearing lifting tool according to any one of claims 1 to 4, The bearing comprises an outer ring, an inner ring, and a plurality of cylindrical rollers disposed on raceway surfaces formed on the outer ring and the inner ring, a notch through which the support portion is inserted is provided on a lower end surface of the outer ring, At least three of the notches are disposed on the lower end surface of the outer ring and are disposed at equal intervals around the axis of the bearing. Bearing.

6. an axially lower end portion of the inner ring is placed on a shaft shoulder portion formed on an axially lower end portion of a rotating shaft to be fitted thereto; The depth of the notch is greater than the difference between the axial thickness of the support portion and the height of the shaft shoulder portion. A bearing according to claim 5.

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