Suspension fixture for bearing

Abstract

To provide a fixture for a bearing, which can easily suspend even a large bearing.SOLUTION: A fixture 1 for a bearing comprises: a pair of arms 2 and 3 extending in a vertical direction; and a beam 4 for connecting the arms 2 and 3. The arms 2 and 3 are respectively provided with pins 23 and 33 extending in opposing directions. The bearing is held by respectively inserting the pins 23 and 33 into oil feed holes formed on the side surface of the bearing to be suspended from the outside.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lifting jig for a bearing used when lifting a bearing with a crane. [Background technology]

[0002] Patent Document 1 discloses a bearing hoisting tool that includes a cylindrical case that houses a bearing to be fitted onto a drive shaft and has an entrance at one end for inserting the bearing, a retaining plate that is attached to the other end of the cylindrical case and has an opening larger than the diameter of the drive shaft, a bearing retainer that is smaller than the opening and larger than the diameter of the drive shaft, and an attachment part for fastening a hoisting rope to the cylindrical case. With this bearing hoisting tool, the bearing inserted through the entrance of the cylindrical case is held on the retaining plate. In this state, the bearing hoisting tool is lifted by a crane to lift the bearing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-42942 Summary of the Invention [Problem to be solved by the invention]

[0004] With the conventional bearing lifting tool described above, the bearing must be manually inserted into the cylindrical case. However, manually inserting a large bearing is not an easy task, and as a result, lifting the bearing is difficult.

[0005] The present invention has been made in view of the above circumstances, and its main object is to provide a lifting jig for a bearing that can solve the above problems. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the present invention provides a lifting jig for a bearing that is used when lifting a bearing with a crane, and comprises a pair of arm portions extending in the vertical direction and a beam portion connecting the pair of arm portions, and each of the pair of arm portions is provided with a rod-shaped portion that extends opposite to each other, and the rod-shaped portions are inserted from the outside into oil supply holes formed on the side of the bearing to hold the bearing.

[0007] In this aspect, the pair of arms may be provided with the rod-shaped portions extending horizontally and facing each other.

[0008] In the above aspect, the pair of arms may be provided such that the distance between them is adjustable.

[0009] In the above aspect, the rod-shaped portion may be provided so as to be able to advance and retreat with respect to the oil supply hole. [Effects of the Invention]

[0010] According to the lifting jig for a bearing of the present invention, even a large bearing can be easily lifted by a crane. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a front view showing the configuration of a hanging jig for a bearing according to an embodiment. [Figure 2] FIG. 2 is a right side view showing the configuration of the bearing hanging jig according to the embodiment. [Figure 3] FIG. 2 is a front view showing the configuration of a bearing to be lifted. [Figure 4] FIG. 10 is a diagram showing a state in which a bearing is disposed between a pair of arm portions. [Figure 5A] FIG. 10 is a front view of a main part showing the configuration of the first arm portion before the pin portion is inserted into the oil supply hole of the bearing. [Figure 5B]FIG. 10 is a front view of a main part showing the configuration of the first arm portion after the pin portion has been inserted into the oil supply hole of the bearing. [Figure 6] FIG. 10 is a front view showing the configuration of the hanging jig in a state where it holds a bearing in a vertical position. DETAILED DESCRIPTION OF THE INVENTION

[0012] The lifting jig for a bearing according to this embodiment is used when lifting a bearing with a crane, and holds the bearing by utilizing an oil supply hole formed on the side of the bearing. Preferred embodiments of the present invention will now be described with reference to the drawings.

[0013] (Configuration of a lifting jig for bearings) 1 and 2 are a front view and a right side view, respectively, showing the configuration of a lifting jig for a bearing according to this embodiment (hereinafter simply referred to as the "lifting jig"). As shown in Fig. 1, the lifting jig 1 comprises a pair of arms 2 and 3 extending in the vertical direction, and a beam 4 connecting the arms 2 and 3. Hereinafter, the arms 2 and 3 will be referred to as the first arm 2 and the second arm 3, respectively.

[0014] The first arm portion 2 includes an arm body 21 and a pin receiving portion 22 attached to the lower end of the arm body 21. The arm body 21 is formed by joining together a first plate portion 21a to a fourth plate portion 21d. The first plate portion 21a to the fourth plate portion 21d are all formed from steel plates, with the first plate portion 21a and the second plate portion 21b having an elongated rectangular shape, the third plate portion 21c having a right-angled triangular shape, and the fourth plate portion 21d having a substantially square shape.

[0015] The first plate portion 21a extends in the up-down direction (vertical direction) with its main surface facing the left-right direction (horizontal direction). The second plate portion 21b has the same length as the first plate portion 21a and extends in the up-down direction with its main surface facing the front-rear direction (the front-rear direction of the paper in FIG. 1). One side surface in the longitudinal direction of the second plate portion 21b is joined to the center in the short direction of the back surface of the first plate portion 21a, as shown in FIG.

[0016] The third plate portion 21c extends in the vertical direction with its main surface facing the front-rear direction, similar to the second plate portion 21b. One side surface of the third plate portion 21c is joined to the center of the upper surface (the surface on the left side of the paper in FIG. 1) of the first plate portion 21a in the lateral direction.

[0017] The fourth plate portion 21d extends in the left-right direction with its main surface facing up and down. The upper end surfaces of the first to third plate portions 21a to 21c are joined to the lower surface of the fourth plate portion 21d, thereby forming the arm body 21.

[0018] The side surface of a cylindrical pin accommodating portion 22 is joined to the lower end of the arm main body 21, i.e., to the lower end surfaces of the first plate portion 21a and the second plate portion 21b. This pin accommodating portion 22 is arranged with its axial direction aligned in the left-right direction, and a cylindrical pin portion (an example of a rod-shaped portion) 23 having a length greater than that of the pin accommodating portion 22 is inserted inside it. As will be described later, this pin portion 23 is inserted into an oil supply hole of the bearing when the bearing is held.

[0019] The outer diameter of the pin portion 23 is slightly smaller than the inner diameter of the pin housing portion 22. Therefore, even if a load is applied to the pin portion 23 inserted inside the pin housing portion 22 in a direction intersecting the axial direction (left-right direction) of the pin portion 23, the horizontal state of the pin portion 23 is maintained.

[0020] A lock lever 24 is attached to the side surface of the pin accommodating portion 22 for locking / unlocking the pin portion 23 relative to the pin accommodating portion 22. The lock lever 24 is attached to the pin accommodating portion 22 so as to be rotatable between a locked position and an unlocked position. When the lock lever 24 is in the locked position, the pin portion 23 is fixed relative to the pin accommodating portion 22, whereas when the lock lever 24 is in the unlocked position, the pin portion 23 is slidable left and right relative to the pin accommodating portion 22.

[0021] The second arm section 3 has the same configuration as the above-described first arm section 2, and is bilaterally symmetrical. Therefore, the components of the second arm section 3 are denoted by reference numerals corresponding to those of the first arm section 2, and detailed description thereof will be omitted.

[0022] As described above, the pins 23 and 33 provided at the lower ends of the first arm 2 and the second arm 3 are arranged to extend horizontally opposite each other and are each slidable horizontally. With this configuration, the pins 23 and 33 can advance and retreat relative to an oil supply hole formed on the side of the bearing to be lifted. This will be described in detail later.

[0023] The beam section 4 includes a beam body 41 and a pair of holes 42 formed in the beam body 41. The beam body 41 is integrally formed by joining a first plate section 41a and a second plate section 41b. The first plate section 41a and the second plate section 41b are made of steel plates and have an elongated rectangular shape.

[0024] The first plate portion 41a extends in the left-right direction with its main surface facing up and down. The second plate portion 41b has the same length as the first plate portion 41a and extends in the left-right direction with its main surface facing forward and backward. One side surface in the longitudinal direction of the second plate portion 41b is located in the center of the short side of the top surface of the first plate portion 41a, as shown in FIG. 2.

[0025] Near the left and right ends of the second plate portion 41b, there are provided holes 42, 42 that penetrate the second plate portion 41b. A pair of rings 43, 43 to which both ends of a sling 5 that is hung on a hook of a crane (not shown) are connected are inserted and fixed into each of these holes 42, 42.

[0026] The fourth plate portion 21d located at the upper end of the first arm portion 2 and the fourth plate portion 31d located at the upper end of the second arm portion 3 are attached so as to be slidable in the left-right direction on the lower surface of the first plate portion 41a located at the lower end of the beam portion 4. This makes it possible to adjust the distance between the first arm portion 2 and the second arm portion 3.

[0027] (How to use the lifting jig) Next, a method of using the hanging jig 1 configured as above will be described. First, we will explain the configuration of the bearing to be lifted using the lifting jig 1. The bearing to be lifted in this embodiment is a well-known one, for example, one with a double cylindrical structure with multiple rolling elements interposed between the cylinders. However, it is necessary that the bearing has two or more oil supply holes on its side.

[0028] Figure 3 is a front view showing the configuration of the bearing to be lifted. As shown in Figure 3, a plurality of oil supply holes 61 for supplying lubricating oil into the bearing 6 are arranged side by side at predetermined intervals in the circumferential direction on the side of the bearing 6. When this bearing 6 is held by the lifting jig 1, the pins 23 and 33 of the lifting jig 1 are inserted into two of the plurality of oil supply holes 61, 61, respectively.

[0029] When lifting the above-mentioned bearing 6 with a crane using the lifting jig 1, the worker first adjusts the distance between the first arm portion 2 and the second arm portion 3 of the lifting jig 1 so that it is approximately the outer diameter of the bearing 6 to be lifted. This operation is performed by sliding the first arm portion 2 and / or the second arm portion 3 relative to the first plate portion 41a of the beam portion 4.

[0030] Next, the worker connects the lifting jig 1 to the hook of the crane via the sling 5, and then operates the crane to move the lifting jig 1 so that the bearing 6 is located between the first arm portion 2 and the second arm portion 3. At this time, the position of the lifting jig 1 is adjusted so that the pin portion 23 of the first arm portion 2 and the pin portion 33 of the second arm portion 3 are each positioned to face the two oil supply holes 61, 61 of the bearing 6. In addition, the amount of protrusion of the pin portions 23 and 33 inward (toward the bearing 6 is located) is adjusted to the extent that the pin portions 23 and 33 do not interfere with the bearing 6.

[0031] 4 is a diagram showing the state in which the bearing 6 is arranged between the first arm portion 2 and the second arm portion 3 of the lifting jig 1 as described above. As described above, the pin portion 23 of the first arm portion 2 and the pin portion 33 of the second arm portion 3 are positioned to face the oil supply holes 61, 61 of the bearing 6, and the bearing 6 is held by the lifting jig 1 by inserting the pin portions 23 and 33 into the oil supply holes 61, 61, respectively.

[0032] Fig. 5A is a front view of the main part showing the configuration of the first arm part 2 before the pin part 23 is inserted into the oil supply hole 61 of the bearing 6, and Fig. 5B is a front view of the main part showing the configuration of the first arm part 2 after the pin part 23 has been inserted. Note that Figs. 5A and 5B show a part of the bearing 6 in cross section.

[0033] Before the bearing 6 is held by the hanging jig 1, as shown in Fig. 5A, the tip of the pin portion 23 is positioned opposite the oil supply hole 61 of the bearing 6. In this state, the worker rotates the lock lever 24 to the unlock position to make the pin portion 23 slidable, and then slides the pin portion 23 toward the bearing 6 (in the direction of the arrow in Fig. 5A) to insert it into the oil supply hole 61.

[0034] 5B, the tip side of pin portion 23 is positioned inside bearing 6 via oil supply hole 61. The worker then rotates lock lever 24 to the locked position to fix pin portion 23.

[0035] As mentioned above, the pin portion 23 can move forward and backward relative to the oil supply hole 61, so the worker can appropriately adjust the amount of protrusion of the pin portion 23 toward the bearing 6, taking into consideration the internal shape of the bearing 6 and the stability of the bearing 6 when lifting it.

[0036] The same operation as that for the first arm portion 2 is performed on the second arm portion 3. As a result, the tip side of the pin portion 33 of the second arm portion 3 is positioned inside the bearing 6 via the oil supply hole 61.

[0037] By the above operation, the pin portion 23 of the first arm portion 2 and the pin portion 33 of the second arm portion 3 are inserted into the two oil supply holes 61, 61 of the bearing 6. This completes the attachment of the lifting jig 1 to the bearing 6.

[0038] After the lifting jig 1 is attached to the bearing 6 as described above, the worker operates the crane to lift the lifting jig 1. At this time, the tip portions of the pin portions 23 and 33 located inside the bearing 6 come into contact with the inner surfaces of the oil supply holes 61, 61, thereby fixing the bearing 6 to the lifting jig 1. Therefore, when the lifting jig 1 is lifted by the crane, the bearing 6 is also lifted together with the lifting jig 1.

[0039] Even when the bearing 6 is lifted and the load acts on the pins 23 and 33, the pins 23 and 33 remain horizontal, extending in the left-right direction (horizontally), thus preventing the pins 23 and 33 from tilting due to the load of the bearing 6. This allows the bearing 6 to be lifted stably, and also effectively prevents damage to the inner surfaces of the oil supply holes 61, 61 that come into contact with the pins 23 and 33.

[0040] The bearing 6 lifted by the crane as described above can be inserted directly into a shaft. For example, as shown in Figure 4, the bearing 6 is lifted in a horizontal position, placed above a vertically extending shaft by the crane, and then lowered downward. This allows the bearing 6 to be inserted into the shaft.

[0041] Furthermore, when inserting bearing 6 into a shaft extending in the left-right direction, as shown in FIG. 6 , bearing 6 is raised vertically while being held by hanging jig 1. This is achieved by rotating bearing 6 around pins 23 and 33 as fulcrums. In the present embodiment, pins 23 and 33 are cylindrical, which makes it easy to rotate bearing 6. By moving bearing 6 in this raised vertical state, it becomes possible to easily insert bearing 6 into a shaft extending in the left-right direction.

[0042] As described above, the distance between the first arm portion 2 and the second arm portion 3 of the hanging jig 1 is adjustable, so the hanging jig 1 can be attached to bearings 6 with various outer diameters. Therefore, there is no need to manufacture a hanging jig 1 each time to fit a bearing 6 with a different outer diameter.

[0043] (Other embodiments) In the above embodiment, the pins 23 and 33 are arranged to face each other and extend horizontally, but this is not limitative and they may be arranged in other ways as long as they can be inserted into the two oil supply holes 61, 61 of the bearing 6. For example, the pins 23 and / or 33 may extend at a slight angle relative to the horizontal.

[0044] Furthermore, in the above embodiment, the pin portions 23 and 33 are provided so as to be able to advance and retreat relative to the oil supply holes 61, 61, but this is not limited thereto, and they may be provided in other modes as long as they can be inserted into the two oil supply holes 61, 61 of the bearing 6. For example, the amount of protrusion of the pin portions 23 and 33 toward the bearing 6 may be fixed.

[0045] In the above embodiment, the lifting jig 1 includes a pair of two arms (the first arm 2 and the second arm 3), but it may also include additional arms of a similar configuration. That is, it is sufficient to include at least two arms. [Explanation of symbols]

[0046] 1 Lifting jig 2 First arm section 21 Arm body 22-pin housing 23 Pin section 24 Lock lever 3 Second arm section 31 Arm body 32-pin housing 33 Pin section 34 Lock lever 4 Beam section 41 Beam body 42 Hole 43 Ring section 5 Sling 6 bearings 61 Oil filler hole

Claims

1. A lifting jig for bearings used when lifting bearings with a crane, A pair of arms extending in the vertical direction; a beam portion connecting the pair of arm portions; Equipped with The pair of arms are provided with rod-shaped portions extending opposite to each other, The rod-shaped portions are inserted from the outside into oil supply holes formed on the side surfaces of the bearing, thereby holding the bearing. Lifting jig for bearings.

2. The pair of arms are provided with the rod-shaped portions extending horizontally and facing each other. The bearing lifting jig according to claim 1.

3. The pair of arms are provided so that the distance between them can be adjusted. The bearing lifting jig according to claim 1 or 2.

4. The rod-shaped portion is provided so as to be able to advance and retreat with respect to the oil fill hole. The bearing lifting jig according to claim 1 or 2.

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