JP2581519B2 - Roller and chock fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fixing a rolling mill roll used in various rolling mills and a chock rotatably supporting the rolling mill roll.

[0002]

2. Description of the Related Art Rolls used in various rolling mills are rotatably supported by a support having a built-in bearing called a chock, and a rolling load is applied thereto. In a rolling mill, various rolls are used when rolling various products. Rolls are frequently replaced because the rolls are damaged or worn. Since the chocks are shared, the work of changing the rolling mill rolls and the chocks is often performed every time the rolls are changed. For this reason, it is desired to facilitate the work of assembling the rolling mill roll and the chock.

FIG. 4 shows a typical prior art for fixing a rolling mill roll and a chock. A roll is provided on the roll shaft 2 of the rolling mill roll 1 in the direction of the axis 3, and a neck portion 4 is formed outward. Further, an annular groove 5 is formed at the outer end in the axial direction. A chock 6 is extrapolated to the roll shaft 2. Rotation bearings 7 and 8 are provided in the chock 6. The inner bearing 7 mainly bears a radial force perpendicular to the axis 3, and the outer bearing 8 mainly bears a thrust force parallel to the axis 3. The outer bearing 8 includes an inner ring 9 that rotates with the roll shaft 2 and an outer ring 10 that stands still with the casing of the chock 6. The chock 6 is connected to the axis 3 of the roll shaft 2 via a bearing 8.
Fixed relative to the direction.

A threaded portion 13 is formed on an inner peripheral portion of the nut ring 12 outside the axis 3. By the screw part 13,
The distance between the annular groove 5 and the inner ring 9 is adjusted. The displacement of the nut ring 12 around the axis 3 with respect to the roll shaft 2 is restricted by the rotation stopper 14, and only the sliding displacement in the direction parallel to the axis 3 is allowed. Screw part 13 of nut ring 12
Are connected by a threaded portion on the outer periphery of the screw ring 15. The screw ring 15 is rotated by a detent 16
Rotational displacement of the thrust ring 17 fitted in the annular groove 5 is prevented. The thrust ring 17 is prevented from being rotationally displaced with respect to the roll shaft 2 by the rotation stopper 18. That is, the chock 6 has a thrust ring 17.
The screw ring 15 and the nut ring 12 press the shaft 3 inward and fix it via the bearing 8.

FIG. 5 shows the structure of the thrust ring 17. The thrust ring 17 has two parts 17a and 17b.
And are connected at one place by a pin 19. An annular thrust ring 17 is formed at a position facing the pin 19 by a fastening bolt 20.

In the prior art for fixing the rolling mill roll and the chock as described above, when the chock 6 is pulled out, the detent 16 with the thrust ring 17 is removed, and the screw ring 15 is moved inward of the axis 3. Then, the thrust ring fastening bolt 20 is removed, the thrust ring 17 is pulled out, and the nut ring 12 and the screw ring 15 are pulled out from the roll shaft 2 while the nut ring 12 and the screw ring 13 are connected by the screw portion 13, and the chock 6 is pulled out. Do with. When the chock 6 is inserted, the procedure is the reverse of the procedure for pulling out.

Another prior art for fixing the rolling mill roll and the chock is disclosed in, for example, Japanese Utility Model Laid-Open No. 5-53707. In this prior art, a configuration in which automatic and mechanical replacement can be performed with one touch is disclosed with the aim of shortening the chocking operation.

[0008]

In the prior art shown in FIGS. 4 and 5, the screw ring 15 is loosened or tightened, the positioning for mounting the detent 16 with the thrust ring 17 is performed, and the mounting and dismounting work is further performed. The removal of the fastening bolts 20 of the thrust ring 17 and the removal of the thrust ring 17 performed while suspended by a crane or the like, or the installation and removal of the combined set of the nut ring 12 and the screw ring 15 by the crane or the like are all manual work. Becomes These operations are a major bottleneck in labor saving and automation of the roll shop for changing the rolling mill rolls.

The prior art disclosed in Japanese Utility Model Laid-Open No. 53707/1993 also requires a mechanism for fixing to be displaced in the radial direction of the roll shaft for attachment and detachment.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for fixing a rolling mill roll and a chock in which the axial direction of the rolling mill roll and the chock can be fixed with a simple structure and the chocks can be easily attached and detached.

[0011]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for extrapolating and fixing a chock having a built-in bearing to a shaft of a rolling mill having an annular groove formed at the shaft end. It is movably inserted, is substantially cylindrical, and has a distal end axially inwardly abutting on the inner ring of a bearing built in the chock, and a base end being more axially inward than the annular groove. And a slide ring disposed on the base of the slide ring and provided so as to extend outward in the axial direction of the roll shaft from a fulcrum provided at a base end of the slide ring, and capable of swinging displacement in a plane including the axis of the roll shaft. When the free end is brought close to the axis of the roll shaft, the free end engages with the annular groove of the roll shaft, and in this engaged state, a thrust stopper for fixing the roll shaft and the chock via the sliding ring is provided. , Placed outside the thrust stopper, roll axis The thrust stopper is urged outward in the axial direction to hold the thrust stopper in the engagement state with the annular groove, and when the thrust stopper is pressed and moved inward in the axial direction, the thrust stopper is moved to the annular groove. A stopper ring that makes a swingable displacement for releasing from the engagement state of the roll shaft, wherein the sliding ring includes an outer ring that is disposed axially outward of the roll shaft, and an axially inward direction. A wedge-shaped space is formed between the opposed end faces of the outer ring and the inner ring, the gap extending radially outward of the roll shaft, and a sliding displacement of the stopper ring is formed. A wedge member that is pushed into the wedge-shaped space when the stopper ring is displaced outward in the axial direction of the roll shaft in conjunction with, and presses so as to increase the interval between the inner ring and the outer ring. A fixed unit of a rolling mill roll and chock characterized.

[0012]

[0013]

[0014]

According to the present invention, the free end of the thrust stopper is engaged with the annular groove formed at the shaft end of the rolling mill roll. The thrust stopper is swingably displaceable in a plane including the axis centering on a fulcrum provided at a base end of a slide ring provided inward in the axial direction of the rolling mill roll.
The tip end of the sliding ring abuts on the inner ring of the bearing built in the chock in the axial direction. Therefore, the chock is fixed to the roll shaft in a state where the free end of the thrust stopper is engaged with the annular groove. Further, by displacing the thrust stopper in a swinging manner and releasing the engagement between the free end portion and the annular groove portion of the roll shaft, the sliding ring can be easily pulled out outward in the axial direction of the roll shaft, The chock can be pulled out of the roll shaft. With the thrust stopper engaged with the annular groove, the outer peripheral portion of the thrust stopper is pressed by the stopper ring, and the engaged state is maintained. Thus, even when the roll shaft rotates, the engagement between the thrust stopper and the annular groove is not undesirably released due to centrifugal force or the like.

According to the invention, the sliding ring is divided into an axially outer ring and an inner ring. Between the end faces where the outer ring and the inner ring face each other,
A wedge-shaped space is formed in which the interval increases radially outward of the roll shaft. In this wedge-shaped space, when the stopper ring is displaced outward in the axial direction of the roll shaft in conjunction with the sliding displacement of the stopper ring, the stopper ring is pushed into the wedge-shaped space to reduce the distance between the inner ring and the outer ring. The expanding wedge member fits. As a result, the length of the sliding ring can be adjusted, and the bearing can be kept constantly pressed against the annular groove, and as a result, the chock is fixed to the roll shaft.

According to the present invention, the free end of the thrust ring is engaged with the annular groove of the roll shaft by the swing displacement of the thrust ring, and the free end is separated from the annular groove and the sliding ring is moved. The state in which the sliding ring is slid in the axial direction with respect to the roll shaft can be easily switched by moving the sliding ring pressed outward by the spring inward. In addition, since the chocks can be attached and detached only by movement in substantially the axial direction, the configuration of the attaching / detaching device is simplified and can be easily realized.

[0017]

1 shows a longitudinal section of a main part of an embodiment of the present invention, FIG. 2 shows a right side surface of FIG. 1, and FIG. 3 shows an enlarged cross section of a further main part of FIG. The upper half of FIG. 1 shows a locked state, and the lower half shows an open state. Hereinafter, the structure and operation of this embodiment will be described with reference to these drawings.

A neck portion 24 is formed on the roll shaft 22 of the rolling mill roll 21 from the inside toward the outside in the direction of the axis 23, and an annular groove portion 25 is formed near the outermost end. A chock 26 is extrapolated to the neck portion 24, and the chock 26 that rotatably supports the roll shaft 22 includes an inner bearing 27 that mainly receives a radial force and an outer bearing 28 that mainly receives a thrust force. It is. The outer bearing 28 includes an inner ring 29 and an outer ring 30.

A swing shaft 3 as a fulcrum is provided in the annular groove 25.
The free end portion 32a of the thrust stopper 32 which can swing and displace in a plane including the axis 23 around the center 1 is fitted into the thrust stopper 32 and abuts on the abutment portion 32b. The swing shaft 31 is supported by an outer sliding ring 33 that can slide and displace in the direction of the axis 23. A wedge member 34 is provided on the inner side of the axis 23 of the outer sliding ring 33. An inner sliding ring 35 is provided slidably in the direction of the axis 23 further inside the axis 23 from the wedge member 34. Opposite end surfaces of the outer sliding ring 33 and the inner sliding ring 35 are inclined surfaces, and a gradient is provided between the end surfaces so as to increase the interval outward in the radial direction to form a wedge-shaped space. A spring 47 is provided in the inner sliding ring 35.
A pin 46 is provided which is pressed by the end surface of the outer sliding ring 33 to always hold the wedge-shaped space in a direction of expanding. The inner sliding ring 35 presses the inner ring 29 inward in the direction of the axis 23. Inner ring 29
Further presses the roll stepped portion 36 of the roll shaft 22 via the spacer 37 inside the neck portion 24. In such a path from the thrust stopper 32 to the inner ring 29,
The thrust force generated in the mill roll 21 is equal to
6 and is supported from outside the chock 26.

A stopper ring 38 is provided outside the wedge member 34. The stopper ring 38 is spring-biased and pressed out of the axis 23 by a built-in spring 39, and the outer sliding ring 33 and the inner sliding ring 35 are pressed.
Is guided by the outer peripheral surface of the slider and is slidable. The displacement of the thrust stopper 32 in the direction perpendicular to the axis 23 is suppressed by the spring 41. However, the spring force of the spring 41 is relatively soft. Stopper ring 38
Is pushed out by the spring 39, the wedge member 34 is pressed inward in the radial direction by the taper formed on the inner periphery of the stopper ring 38. A pressing pin 43 pressed by a spring 42 is provided in the wedge member 34.
The tip of the pressing pin 43 presses the flat part of the inner sliding ring 35. The wedge member 34 includes the outer sliding ring 3.
3 and the inner sliding ring 35 are fitted into a wedge-shaped space formed between the opposing end faces, and when pressed, the distance between the outer sliding ring 34 and the inner sliding ring 35 is increased to reduce the backlash. lose.

The outer end 38a of the stopper ring 38 outside the axis 23 presses the thrust stopper 32 radially inward from the outside of the fulcrum with respect to the axis 23 in the upper half of FIG. The free end portion 32a of the thrust stopper 32 is kept engaged with the annular groove portion 25. A hook 44 is provided on the stopper ring 38 so that the outer sliding ring 3
3 is in contact with the outer end face. A cover 45 is provided outside the stopper ring 38 and is fixed to the chock 26.

In the open state shown in the lower half of FIG. 1, the stopper ring 38 is moved from the outside of the axis 23 to the roll stepped portion 3.
This is realized by pressing in the direction of 6 and contracting the spring 39. When the stopper ring 38 is slid and displaced inward of the axis 23, the contact portion of the tapered portion A formed on the inner peripheral surface of the stopper ring 38 with the wedge member 34 is displaced in a direction away from the stopper ring 38. Therefore, the wedge member 34 is displaced radially outward by the pressing force of the pressing pin 43 by the spring 42, and the opposed inclined surfaces between the outer sliding ring 33 and the inner sliding ring 35 and the surface of the wedge member 34 There is a gap between them. When the stopper ring 38 is pushed inward by S, the hook 44 presses the outer sliding ring 33 inward in the direction of the axis 23, and the outer sliding ring 33 corresponds to a gap formed between the outer sliding ring 33 and the wedge member 34. The sliding displacement is performed inward by the interval δ. In this state, the thrust stopper 32 is
A gap d is generated in the abutting portion 32b at a portion where the thrust stopper 32 is engaged with the thrust stopper 32, and the thrust stopper 32 can be displaced radially outward about the pivot shaft 31 in the radial direction. Although the thrust stopper 32 is prevented from oscillating displacement outward in the radial direction by the spring 41, the spring force of the spring 41 is relatively weak and soft, so that a slight A swaying displacement in a radially outward direction can be generated only by applying a force.
In the state of such a two-dot chain line, the thrust stopper 32,
Outer sliding ring 33, wedge member 34, inner sliding ring 35
And the stopper ring 38 can be easily attached to and detached from the outside of the axis 23. Further, after the members are withdrawn from the roll shaft 22, the cover 45 forms
6 is held. Therefore, the chock 26 and each of the above members can be detached at the same time. Axis 23 of inner sliding ring 35
Since the taper is formed on the inner end face in the direction, there is a centering action when attaching / detaching to / from the roll shaft 22, and the work becomes easy.

According to the present embodiment, in the locked state, the distal end portion 38a of the stopper ring 38 presses outward of the axis 23 and radially outward of the fulcrum of the center of the swing shaft 31 of the thrust stopper 32. Therefore, even when the roll shaft 22 rotates, the thrust stopper 32 is prevented from swinging outward due to centrifugal force. The swing displacement of the thrust stopper 32 outward in the radial direction can be performed as a series of operations after the operation of inserting a tool from outside the axis 23 and moving the stopper ring 38 inward. The locked state is automatically held by the springs 39, 41, 42, 47. In this embodiment, since the number of components is relatively small and does not spread outward in the radial direction,
The secure fixing device can be made compact. In addition,
The outer slide ring 33 or the like may be provided with one rotation stopper against the rolling roll 21.

In FIG. 2, the thrust stopper 32
Are provided at six locations in the circumferential direction of the roll shaft 22, but other numbers such as four locations or eight locations may be provided. Also,
Although the spacer 37 is provided between the roll stepped portion 36 and the inner ring 29, the spacer 37 may directly contact the inner ring 29 depending on the shape of the roll stepped portion 36.

[0025]

As described above, according to the present invention, it is possible to easily switch between the fixed state and the slidable state of the sliding ring by the swing displacement of the thrust stopper. By making the sliding ring slidable and pulling it out of the roll shaft of the rolling mill, the chocks can be easily attached and detached, and by providing a cover and holding the sliding ring at the time of removal as in this embodiment, The sliding ring can be easily attached and detached at the same time.

According to the present invention, since the length of the sliding ring is automatically adjusted with respect to changes in the width of the pressed bearing and the position of the annular groove, the chocks can be easily fixed with reference to the annular groove. be able to.

Further, according to the present invention, it is possible to easily displace the thrust stopper by simply moving the tool in the axial direction of the roll shaft, to easily pull out the slide ring, and to easily pull out the chock from the roll shaft. it can.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of an embodiment of the present invention.

FIG. 2 is a right side view of the embodiment of FIG.

FIG. 3 is an enlarged sectional view showing a configuration related to an outer sliding ring 33, a wedge member 34, an inner sliding ring 35, and a stopper ring 38 of the embodiment of FIG.

FIG. 4 is a sectional view of a main part of a conventional fixing device.

FIG. 5 is a front view of the thrust ring 17 of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Roller roll 22 Roll shaft 23 Axis line 24 Neck part 25 Annular groove part 26 Chock 27, 28 Bearing 29 Inner ring 31 Swing shaft 32 Thrust stopper 32a Free end part 32b Contact part 33 Outer sliding ring 34 Wedge member 35 Inner sliding Ring 38 Stopper ring 39, 41, 42, 47 Spring 44 Hook

Claims (1)

(57) [Claims] An apparatus for extrapolating and fixing a chock having a built-in bearing to a shaft of a rolling mill roll having an annular groove formed at a shaft end, wherein the device is slidably inserted into the shaft of the rolling mill roll. A sliding ring that is cylindrical in shape, and whose distal end is abutted on the inner ring of the bearing built in the chock in the axial direction and whose base end is closer to the axial inward than the annular groove. Is provided so as to extend outward in the axial direction of the roll shaft from a fulcrum provided at the base end of the sliding ring, and can be swingably displaced in a plane including the axis of the roll shaft, and the free end of the roll shaft is When approaching to the axis, the free end engages with the annular groove of the roll shaft, and in this engaged state, a thrust stopper that fixes the roll shaft and the chock via the sliding ring, and is disposed outside the thrust stopper. , Can slide and displace along the axis of the roll shaft In order to release the thrust stopper from the engagement with the annular groove when the thrust stopper is held in the engagement with the annular groove by being urged outward in the axial direction and pressed and moved inward in the axial direction. A stopper ring that makes the rocking displacement possible.The sliding ring is divided into an outer ring disposed axially outward of the roll shaft and an inner ring disposed axially inward. A wedge-shaped space is formed between the opposed end faces of the outer ring and the inner ring, the gap extending outward in the radial direction of the roll shaft, and the stopper ring is interlocked with the sliding displacement of the stopper ring. A rolling mill row including a wedge member which is pushed into the wedge-shaped space when displaced outward in the axial direction of the roll shaft, and presses so as to increase the interval between the inner ring and the outer ring. The chocks of the locking device.