JPH08219165A - Bearing hanging method and bearing hanging jig - Google Patents

Abstract

PURPOSE: To make the operation efficient, by supporting the bearing lower end surface on the lowermost part by projecting plate lower end parts while centering an annular bearing stacked by extending the projecting plates, holding a bearing to a jig, and performing inserting and removing to a bearing box are performed. CONSTITUTION: An extending/contracting link mechanism is contracted by lock pins 38, a bearing hanging jig is inserted into a bearing 3 and set on the bearing 3 so that the upper surface of a pawl fitting 34 may be lower than the lower end surface of the bearing 3. The pins 38 are drawn out, the lock of a lifting frame 21 to a lifting shaft 32 is released, and the lifting shaft 32 is lifted, and therefore, extending plates 25 are extended outward by a parallel link, pawl fittings 35 are engaged with the lower end of the bearing 3, the extending plates 25 press an inner ring part of the bearing 3, and the centering of the bearing 3 is performed. When the lifting shaft 32 is lifted, the bearing 3 can be easily drawn out by clearance fit of a bearing box 2 to the bearing. In incorporating, the bearing 3 is hung and inserted into a bearing box 2, the lifting shaft 32 is pressed down, and therefore, pressing force to the inner ring part of the bearing 3 and engagement of the bearing 23 with the pawl fittings 34 are released, and the jig can be drawn out from the bearing inside by the insertion of the pins 38.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a method of suspending a bearing in which a multi-row bearing is incorporated in a bearing box or taken out from the bearing box, and a bearing suspending jig used therefor.

[0002] The present invention relates to a jig used for a work such as assembling a receiver in a bearing box or taking it out from the bearing box.

[0003]

2. Description of the Related Art FIGS. 6 and 7 show a multi-row bearing structure which is attached to both ends of a roll shaft of a rolling mill. FIG. 6 shows one end of a roll shaft (roll neck) of the rolling mill. 1 shows a structure of a bearing portion, in which a roll shaft 1 is rotatably supported by a roll bearing (a multi-row bearing, for example, a four-row tapered roller bearing) (hereinafter referred to as a bearing) 3 incorporated in a bearing housing 2. 7 is an explanatory view showing the details of the main part thereof, which is composed of outer rings 3a, 3b, 3c, outer ring spacers 3d, 3e, inner rings 3f, 3g, and inner ring spacer 3h.

Since the bearing 3 for a rolling mill needs to be inspected, serviced, replaced, etc. every certain operating hours, the roll shaft 1 of this type has a roll shaft 1 for easy mounting and dismounting. It is generally mounted in a clearance fit with No. 1, the roll shaft 1 shown in FIG. 6 is removed, the bearing box 2 and the bearing 3 are integrated, and as shown in FIG.
The bearing 3 is placed vertically and the bearing 3 is extracted and assembled. Since the bearing 3 has a large diameter and it is generally difficult to pull out and install the bearing 3 manually, a proper work jig is required.

FIG. 9 is an explanatory diagram of a hoisting method using a jig for the outer ring 3b of the split type bearing (multi-row bearing) 3, and FIG. 10 is an explanatory diagram of a hoisting method using a jig for the inner rings 3f and 3g. In these methods, the constituent parts of the bearing 3 are handled individually.

In addition to this, a method using a jig as shown in FIGS. 11 and 12 is also used. FIG. 11 is a sectional view thereof, and FIG. 12 is a plan view thereof.
An upper support plate 7 and lower support plates 8 and 9 are attached to the base plate, and a claw metal fitting 10 is attached between the lower support plates 8 and 9 so that the fixing position thereof can be adjusted. When using this jig, the lifting rod 5 is inserted into the bearing 3 with the claw metal fitting 10 held between the lower support plates 8 and 9, and the upper support plate 7 is placed on the upper end surface of the bearing 3. After the claw fitting 10 sandwiched between the lower support plates 8 and 9 is drawn outward and engaged with the lower end surface of the bearing 3, the eyebolt 6
Lift by. When the jig is inserted into the bearing 3, the jig is inserted into the bearing 3 with the butterfly bolt 11 having a diameter smaller than the inner diameter of the bearing 3, and then the jaw metal 10 is inserted into the bearing 3 from the butterfly bolt 11. The bearing 3 is lifted by the eyebolt 6 after being adjusted so as to engage with the lower end surface of the bearing.

[0007]

The method using the outer ring lifting jig or the inner ring lifting jig shown in FIGS. 9 and 10 requires a long working time because the bearing components are individually handled, and the entire bearing is inefficient. There was a defect that it could not be centered.

In the method using the jigs shown in FIGS. 11 and 12, it is difficult to adjust the wing bolt 11 by putting a hand inside the bearing depending on the size of the bearing, or the claw metal fitting 10
There are drawbacks such that two workers are required for adjustment and the work is time-consuming and inefficient.

The present invention eliminates the drawbacks of these conventional methods, and, for example, hoisting a multi-row bearing as a unit and simultaneously performing centering of the bearing during hoisting, thereby incorporating or taking out the bearing from the bearing housing. It is an object of the present invention to provide a bearing suspending jig that can be easily and efficiently performed.

[0010]

The constitution of the present invention taken to solve the above-mentioned problems is as follows.

The method of suspending a bearing according to the present invention is as follows: (1) With a plurality of annular bearings stacked, a jig is inserted into the center of the bearing, and the overhanging plate attached to the jig is placed on the outer periphery. The inner peripheral wall of the bearing is expanded by pressing in the direction to center the plurality of stacked annular bearings, and at the same time, the stacking is performed at the lower end of the overhang plate. It is characterized in that the lower end surface of the lower bearing is supported, the stacked bearings are integrally held by the jig, and the bearings are inserted into and removed from the bearing box while being integrally held by the jig.

(2) The bearing suspending jig of the present invention comprises: (2) the upper end of the first link is rotatably attached to the hoisting frame, and the lower end of the first link is rotatably attached to the upper part of the overhanging plate. The upper end of each of the second and third links forming the link is rotatably attached to the projecting plate, and the lower end of the second and third link is rotatably attached to one lifting shaft. A hook member is attached to the lower end portion, and the lifting shaft that penetrates the central portion of the lifting frame is moved up and down, so that the first and second links are formed by the rotating action of the second and third links. One of the link mechanisms is such that the overhanging plate supported by the link moves in the direction normal to the lifting shaft, and the claw fitting attached to the lower end of the overhanging plate can move substantially horizontally in the direction normal. Stretchable link mechanism as a unit A plurality of sets are arranged around the lifting shaft, and a means is provided for fixing the lifting shaft and the lifting frame in a state where the telescopic link mechanism is contracted.

(3) A hoisting frame having a bearing hoisting shaft that penetrates through the central part and moves up and down in the central part, and is arranged in parallel around the bearing hoisting shaft and has a lower end in the radial direction. A plurality of overhanging plates having extending claw fittings for bearing support, a first group in which an upper end is rotatably attached to the lifting frame and a lower end is rotatably attached to an upper end of the overhanging plate. And one end of the first group of links are rotatably rotatably supported, and the other end is attached to the bearing lifting shaft so as to form a parallel link.
Group and third group links, and means for locking the lifting shaft to the lifting shaft are provided.

(4) In (2) or (3), a space adjusting means that can be replaced according to the size of the inner peripheral portion of the bearing to be suspended is replaceably attached to the bearing facing surface of the overhang plate. It is characterized by being.

[0015]

In the hoisting jig of the present invention, for example, a hoisting frame located above the bearing and a hoisting shaft vertically passing through the central portion thereof are provided, and three links and one projecting plate are provided. Since there are multiple sets of link type expansion / contraction mechanisms, each of which has one claw metal fitting as one unit, are arranged in the normal direction of the lifting shaft,
When pushing the lifting shaft downward, the link mechanism contracts close to the lifting shaft, and when it is lifted above the lifting shaft,
At the same time that the pawls extend outward of the hoisting shaft and the claw fittings evenly engage multiple points on the lower end surface of the bearing to hoist the bearing, and at the same time, the overhanging plate contacts the inner diameters of the inner rings of the bearings. By pressing evenly, the shaft as a whole can be centered.

Further, since the lock mechanism for temporarily fixing the hoisting frame and the hoisting shaft is provided, when the jig is inserted into or taken out from the bearing, the link mechanism is extended by the vertical movement of the hoisting shaft. Instead, it can hold the contracted state close to the lifting shaft.

In the method of suspending a bearing according to the present invention, for example, the operation of engaging the bearing and the pawl metal fitting for hoisting the multi-row bearing as a unit and the centering operation of the multi-row bearing are performed by one hoist. There is a feature that they can be carried out simultaneously by manipulating the shaft, and this type of bearing can be efficiently incorporated into and taken out from the bearing housing.

[0018]

EXAMPLES Examples will be described below with reference to FIGS. 1 to 12, the same parts are designated by the same reference numerals. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a sectional view taken along the line BB of FIG. 1, and FIG. 4 is a sectional view of another embodiment using an adapter. , FIG. 5 shows C- of FIG.
The C sectional view is shown.

Reference numeral 21 is a cross-shaped suspension frame having bolts 20 provided at each end thereof, and a bearing suspension shaft 32 penetrating through the center thereof and vertically moving therethrough. Reference numeral 25 is parallel to the periphery of the bearing suspension shaft 32. Bearing 3 which is arranged and extends in the radial direction at the lower end
A plurality of overhang plates having claw fittings 34 for engagement with
2 is a first group of links whose upper end is rotatably attached to the hoisting frame 21 and whose lower end is rotatably attached to the upper end of the overhanging plate 25, and 27 and 29 are the first links 22.
One end of each of which is rotatably supported, and the other end of which is attached to the bearing lifting shaft 32 so as to form a parallel link.
38 is a lock pin for fixing the hoisting shaft 32 connected to the chain 37 to the hoisting frame 21, 39 is attached to the tip of the overhanging plate 29, and the overhanging plate 25 and the bearing 3
2 shows an adapter attached to adjust the spacing between and.

That is, in the bearing lifting jig of this embodiment, the lifting frame 21 supported on the bearing 3 by the bolt 20 and the upper end of the first link 22 are fixed by the pin 23 to the upper end of the second link 27. And the overhanging plate 25 with the pin 26, and the lower end of the second link 27 and the lifting shaft 32 with the pin 26.
8, the upper end of the third link and the overhanging plate 25 are rotatably connected to each other by the pin 30, and the lower end of the third link 29 and the lifting shaft 32 are rotatably connected to each other by the pin 31. A parallel link is formed with 29. At the lower end of the overhang plate 25, a claw fitting 34 is provided with a bolt 35.
Four expansion link mechanisms, each of which is composed of the first link 22, the second link 27, the third link 29, the overhanging plate 25, and the claw metal fitting 34, are arranged around the lifting shaft 32. The entire jig is vertically moved as a unit by the eyebolt 33 attached to the lifting shaft 32.

Further, the pin hole penetrating the hoisting frame 21 is
Only when the pin hole provided in the locking ear 36 fixedly provided on the lifting shaft 32 and the telescopic link mechanism are contracted, the rod pin 38 (FIG. 1, FIG. 1) connected to the chain 37 (see FIG. 2) is matched. (See FIG. 2) It is provided at a position where it can be inserted.

The bearing suspending jig shown in FIGS. 1 to 3 is an example in which four sets of expansion and contraction link mechanisms are arranged and claw fittings 34 are provided for the two sets facing each other.

Next, the operation will be described. When the bearing 3 fitted in the bearing box 2 is to be removed as shown in FIG. 1, first, the lock pin 38 is attached and the expansion link mechanism is held in a contracted state, and the bearing suspension jig is set. The bolt 20 is inserted into the bearing 3 and the height of the bolt 20 is adjusted and set on the bearing 3 so that the upper surface of the claw fitting 34 is slightly lower than the lower end surface of the bearing 3.

Next, the lock pin 38 is pulled out, and the lifting frame 2
1 and the lifting shaft 32 are unlocked, and the eyebolt 3
When the hoisting shaft 32 is hoisted by 3, the second link 27 and the third link 29 act as a parallel link so that the overhanging plate 25 connected to the hoisting shaft 25 is kept vertical and outwardly hangs up to the first link 22. Is 22 'and the second link 27 is 2
7 ', the third link 29 is 29', and the overhang plate 25 is 2 '
5 ', the claw fittings 35 move to the positions indicated by the two-dot broken lines in 35'. Therefore, the lower surface of the bearing 3 is attached to the claw fitting 35.
Engages with each other to bring the bearing 3 into a state where it can be lifted and pulled out, and the overhanging plate 25 'comes into contact with the inner ring portion of the bearing 3 and exerts a force to press the inner ring portion. By pressing with, the bearing 3 as a whole is centered. When the hoisting shaft 32 is hoisted by the eyebolt 33 in this state, the bearing box 2 and the bearing 3 have a clearance fit, so that the bearing 3 can be easily pulled out from the bearing box 2. When the bearing 3 is assembled in the bearing box 2, the bearing 3 is individually hung and inserted into the bearing box 2 by the same method as described above, and after confirming predetermined assembly dimensions,
When the lifting shaft 32 is pushed down, the link mechanism returns from the state shown by the two-dot broken line to the state shown by the solid line, and the pressing force on the inner ring portion of the bearing 3 and the engagement between the lower surface of the bearing 3 and the claw fitting 34 are released. Therefore, by inserting the lock pin 38, it is possible to pull out the bearing suspending jig from the inside of the bearing while keeping the entire expandable link mechanism in the contracted state.

The overhanging plate 25 by this link mechanism
The overhang movement amount of is determined by the length and mounting angle of each link, and the bearing diameter to which this bearing suspension jig can be applied is limited to a certain range, but we would like to use the same jig for larger diameter bearings. In this case, for example, it can be shared by attaching an adapter 39 as shown in FIGS. 4 and 5. That is, the same jig can be used for a wider range of bearings by appropriately selecting and replacing the adapter 39 having a size that fills the gap between the inner diameter of the bearing 3 and the overhang plate 25 that occurs in an appropriate angle range of each link. There is convenience that can be applied.

[0026]

The method of suspending a bearing and the jig for suspending a bearing according to the present invention are used for attaching / detaching a jig to / from a bearing, centering work for a multi-row bearing,
The operation of engaging the claw jig for lifting the bearing can be efficiently performed by one operator by the vertical movement of one lifting shaft, and the same jig can be used for a wide range of diameters by using the adapter together. It can be applied to a wide range of bearings, and has a great industrial effect.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a bearing suspension jig of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view of a main part of another embodiment of the bearing suspending jig of the present invention.

5 is a cross-sectional view taken along line CC of FIG.

FIG. 6 is a cross-sectional view of a multi-row bearing structure attached to both ends of a roll shaft of a rolling mill.

FIG. 7 is an explanatory diagram of a main part of FIG.

FIG. 8 is an explanatory diagram showing a relationship between a bearing box and a bearing.

FIG. 9 is an explanatory view of a conventional bearing suspension jig.

FIG. 10 is an explanatory view of a conventional bearing suspension jig.

FIG. 11 is an explanatory view of a conventional bearing suspending jig.

FIG. 12 is a plan view of FIG.

[Explanation of symbols]

2 ... Bearing box, 3 ... Roll bearing, 21 ... Lifting frame, 22,
27, 29 ... Link, 23, 24, 26, 28, 30,
31 ... Pin, 25 ... Overhanging plate, 32 ... Bearing lifting shaft,
33 ... Eye bolts, 34 ... Claw fittings, 37 ... Chains, 3
8 ... Lock pin, 39 ... Adapter.

Claims (4)

[Claims] 1. A bearing, wherein a plurality of annular bearings are stacked, a jig is inserted into the center of the bearing, and a projecting plate attached to the jig is expanded toward the outer peripheral direction. The inner peripheral wall of is pressed to center a plurality of the stacked annular bearings, and at the same time, the lower end of the overhanging plate supports the lower end surface of the stacked lowermost bearing. A method of suspending a bearing, wherein the stacked bearings are integrally held by the jig, and the bearings are inserted into and removed from the bearing box while being integrally held by the jig. 2. A second link and a third link which form parallel links by rotatably attaching the upper end of the first link to the hoisting frame and the lower end of the first link to the upper part of the projecting plate, respectively. The upper end of each of the above is attached to the projecting plate, the lower ends of the second and third links are rotatably attached to one lifting shaft, and the claw fittings are attached to the lower end of the projecting plate. By vertically moving the lifting shaft that penetrates the central part of the second link, the overhanging plate supported by the first link is rotated by the rotating action of the second and third links forming the parallel link. The lifting link mechanism is composed of a link mechanism that moves in the normal direction with respect to the claw fitting attached to the lower end of the overhanging plate and can move substantially horizontally in the normal direction. Arrange multiple sets around the shaft, A bearing hoisting jig, comprising means for fixing the hoisting shaft and the hoisting frame when the telescopic link mechanism is contracted. 3. A hoisting frame in which a bearing hoisting shaft that penetrates through the central part and moves up and down is provided in a central part, and the hoisting frame is arranged in parallel around the bearing hoisting shaft and extends in a radial direction at a lower end part. A plurality of overhanging plates having bearing support pawls, a first group of which an upper end is rotatably attached to the lifting frame, and a lower end is rotatably attached to an upper end of the overhanging plate. One end of each of the link and the link of the first group is rotatably supported, and the other end is attached to the bearing lifting shaft so as to form a parallel link. And a means for locking the lifting shaft to the lifting shaft, the bearing lifting jig. 4. An interval adjusting means that is replaceable according to the size of the inner peripheral portion of the bearing to be suspended is replaceably attached to the bearing facing surface of the projecting plate. Bearing suspension jig.