JPH11703A - Rolling roll bearing fixing device - Google Patents

Abstract

(57) [Summary] [Problem] Suitable for automatic roll change, suitable for setting an appropriate gap in the axial direction, operable without sealing hydraulic pressure, easy to fit into the shaft. In a roller bearing fixing device provided between a bearing for supporting a shaft and a circumferential groove provided on the shaft, a ring-shaped inner ring retainer having one end opposed to an inner ring end surface of the bearing. 10, a ring-shaped main body 11 fitted at a position on the shaft end side with respect to the inner ring retainer, and a first
A stopper 12 protruded by the spring device, a first fluid pressure driving means 13 for driving the stopper backward at least to the inner peripheral surface of the main body, a second spring device 15 for pressing the inner ring retainer toward the main body, and an inner ring retainer. Second fluid pressure driving means 16 for pressing against the inner ring against the spring action, and a position-adjustable regulation for restricting the axial movement position of the inner ring retainer against the main body by the second spring device by abutting the inner ring retainer. Means 17. The stopper detecting means 20 is provided. Guide cover
It is coaxially supported by the support portion 19 at 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing fixing device for removably fixing a bearing receiving a load in an axial direction to a roll in a rolling mill.

[0002]

2. Description of the Related Art Most of conventional devices of this type have a circumferential groove provided on the shaft end side of the roll shaft portion with respect to the bearing position, and a divided ring having a male thread on the outer periphery is fitted into the circumferential groove. The nut is screwed into the male screw part, the thrust of the nut is applied directly to the inner ring of the bearing or through a cylindrical body, and the inner ring is pressed against the side face of the circumferential groove on the roll shaft end side, during rolling. The structure is such that the roll shaft and the bearing are fixed so as not to come off even in the state of receiving the generated axial load. Further, the nut is further fixed with a lock nut or a bolt so as not to be loosened even when subjected to vibration or centrifugal force during rolling.

[0003] In an actual rolling operation, several kinds of products having different sizes and shapes are rolled by the same rolling mill. Therefore, each time the rolled product changes, the rolls are frequently changed. Roll exchange is performed by removing the bearing device and bearing fixing device that has been assembled on the roll once from the rolling mill, separating it outside the rolling line, rolling the bearing device and bearing fixing device on a new roll, and then rolling. Built into the machine. These tasks are
The handling operation is performed by a large number of workers, and there is a problem that many workers and time are required.

In order to solve this problem, various bearing fixing devices for saving labor and automation have been developed, and some of them have been put to practical use. For example, Japanese Utility Model Laid-Open No. 7-1527, JP-A-6-307449, JP-A-6-184077 and the like. However, none of the above-mentioned conventional bearing fixing devices has an adjusting function for an axial gap. Therefore, it is not suitable for high-speed rotation specifications. Further, since the pressure oil is used in a sealed state, there is a possibility of oil leakage, and it is difficult to automate the operation because another lock mechanism is required. Besides this,
There are JP-A-6-292912, JP-A-7-32309 and the like. However, in each case, the axial gap between the bearing inner ring and the circumferential groove is eliminated using hydraulic pressure, and the retaining member is dropped into the circumferential groove. During operation, the hydraulic pressure must be maintained, requiring a complicated structure and advanced technology for monitoring and locking hydraulic pressure leaks.

Normally, in the case of a double row tapered roller bearing, a gap is fitted between the bearing inner ring and the roll shaft. In this case, an appropriate clearance is provided between the bearing inner ring end face, the bearing fixing device, and the circumferential groove.
That is, it is necessary to provide an appropriate gap in the axial direction to prevent seizing of the end face during rotation. Therefore, in the conventional work of assembling the roll and the bearing, the nut is once tightened to a position where there is no gap between the nut and the bearing inner ring through the split ring dropped into the circumferential groove of the roll, and then returned by about half a turn. A proper gap is secured by locking the nut at that position. In the case of a double-row cylindrical roller bearing, the bearing inner ring is integrated with the roll shaft by shrink fitting or the like and rotates together with the shaft. Therefore, there is no need to provide a gap in contact with the end surface.

[0006]

In the prior art, there are some problems in setting the proper clearance in the axial direction and promoting the automation of the roll exchange. In other words, the setting of the appropriate clearance in the axial direction is not always suitable for automation, and the one incorporating a hydraulic drive device cannot be operated unless the hydraulic pressure is sealed. There is a problem that it is difficult to simultaneously fit the roll shaft with the roll shaft. An object of the present invention is to solve the above-mentioned problem in a bearing fixing device installed between an end face of a bearing inner race and a circumferential groove of a roll shaft.

[0007]

According to the present invention, there is provided a bearing fixing device comprising: a bearing for supporting a shaft of a rolling roll; and a circumferential groove provided on the shaft at a position closer to the shaft end than the bearing. In a rolling roll bearing fixing device provided between, a ring-shaped inner ring retainer fitted axially movably to the shaft and having one end facing the shaft end side end surface of the inner ring of the bearing; and A ring-shaped main body fitted axially movably at a position closer to the axial end than the inner ring retainer, a stopper provided on the main body, and projected from the inner peripheral surface of the main body into the circumferential groove by a first spring device; First fluid pressure driving means provided in the main body for driving the stopper backward to at least the inner peripheral surface of the main body, a second spring device provided in the main body for pressing the inner ring retainer toward the main body, and the main body The inner ring retainer is provided on the second A second fluid pressure driving means for pressing the inner ring side against a spring action of the device, and an axial moving position provided by the second spring device with respect to the main body of the inner ring press provided on the main body, in contact with the inner ring press. And a regulating means capable of regulating a regulating position (claim 1).

In this bearing fixing device, when the pressurized fluid is supplied to the first fluid pressure driving means, the stopper is retracted against the first spring device so as not to protrude from the inner peripheral surface of the main body, When the pressurized fluid is not supplied to the second fluid pressure driving means, the inner ring retainer is pressed toward the main body by the second spring device, and the inner ring contact side end of the inner ring retainer and the projecting position of the stopper. Is at a minimum. This state is a preparation state for attachment and detachment. In the preparation state, the bearing fixing device is fitted to or removed from the shaft end side of the bearing with respect to the roll shaft.

At the time of mounting, in the above-mentioned preparation state, the bearing and the bearing fixing device are fitted to the shaft of the roll to bring the inner ring of the bearing into contact with the end face of the fillet ring of the roll. When the pressurized fluid is discharged, the stopper
The spring device protrudes into the circumferential groove. At this time, since the distance between the end of the inner ring retainer and the stopper is the minimum dimension as described above, the stopper protrudes into the circumferential groove with a margin without interfering with the edge of the circumferential groove.

When the pressurized fluid is supplied to the second fluid pressure driving device after the stopper is projected, the inner ring retainer is driven against the second spring device to abut against the inner ring of the bearing.
The stopper comes into contact with the side face on the shaft end side of the circumferential groove to be in a stretched state. In the tension state, the bearing inner ring, the inner ring retainer, the second fluid pressure driving means, the main body, and the stopper are interposed between the side surface of the circumferential groove on the shaft end side and the end face of the fillet ring of the roll. Is a state where it is pushed open by the fluid pressure of the second fluid pressure drive means. If the inner ring retainer is kept in the restricted state by the restricting means in this stretched state, a necessary proper gap cannot be obtained.Therefore, the restricting means is once brought into contact with the inner ring retainer, and then the restricting state is returned at a position where the distance is returned by a small dimension. And Then, the pressurized fluid of the second fluid pressure driving means is discharged. This state is a bearing fixed state, and the inner ring of the bearing is held by a bearing fixing device that receives an axial reaction force from the circumferential groove so as to abut or face through the appropriate gap. The first and second fluid pressure driving means using the pressure fluid in the fixed bearing state are not supplied with the pressure fluid.

At the time of removal, when the restricting means is released, the axial distance between the end of the inner ring retainer and the stopper of the bearing fixing device becomes the minimum dimension by the action of the second spring device. Next, when the pressurized fluid is supplied to the first fluid pressure driving means to retract the stopper from the protruding state, the state returns to the ready state, and the bearing and the bearing fixing device can be removed.

In the bearing fixing device according to the present invention, the first fluid pressure driving means comprises a plurality of sets of cylinders and pistons provided at equal intervals in a radial direction of the main body and in a circumferential direction of the main body. Preferably, a plurality of pistons are provided corresponding to the piston, and the piston and the stopper are connected (claim 2). In this configuration, since the plurality of stoppers protrude at equal intervals in the circumferential direction from the inner peripheral surface of the main body, there is no tendency that the main body is inclined with respect to the roll shaft in a state of tension in contact with the side surface of the inner peripheral groove. . Therefore, the inner ring retainer also presses the inner ring coaxially.

In the bearing fixing device according to the present invention, the second fluid pressure driving means may include an annular cylinder portion formed coaxially with the main body on the inner ring holding side of the main body, and a main body of the inner ring holding body. An annular piston formed and fitted into the annular cylinder portion is preferable (claim 3). In this configuration, the output of the second fluid pressure driving means increases even if the thickness of the cylinder portion in the radial direction is not so large, so that a sufficient tension force can be obtained, which is effective for downsizing the bearing fixing device. At the same time, it is possible to reliably set the appropriate gap by setting a sufficient tension force.

[0014] In the bearing fixing device of the present invention, a lock member provided with the regulating means so as to slidably penetrate the main body along the direction of the axis of the main body and one end thereof is opposed to the ring retainer; It is preferable that the lock member is constituted by a screw member which is opposed to the other end of the lock member, is screwed to the main body, is movable in the direction of the axis of the main body, and is locked at the desired movement position. . In this configuration,
During the period when the second fluid pressure driving means is operated by supplying the pressure oil, the second fluid pressure driving means presses the holding ring toward the inner ring side by overcoming the action of the second spring device. In this state, if the screw member of the regulating means is operated in this state, the axial pressing force by the second spring device does not act on the screw member, so that the position adjustment by the screw member can be performed with a small rotational force.

In the bearing fixing device according to the present invention, the stopper is formed to have a predetermined length substantially along the circumferential groove, and an intermediate portion thereof is connected to a piston rod integrally formed with the piston. The main body has a recess for accommodating the stopper when the stopper is retracted, and the first spring device is provided between both sides of the piston rod coupling portion of the stopper and the inside of the recess facing the both sides. It is preferable to adopt a configuration formed by a pair of coil springs. In this configuration, the stoppers are made to protrude by the action of the paired coil springs and are kept in the protruding state. The force required to protrude the stopper is such that the piston to which the pressurized fluid is not supplied is surely moved, and in order to obtain this force, the coil spring that makes use of the compression reaction force is sufficiently strong. In addition, it can be formed small including the installation space.

In the bearing fixing device according to the present invention, a guide cover which is formed in a cylindrical shape and covers the outer periphery of the main body at an interval and is coaxially fixed to a shaft box of the bearing is provided. An opening is provided on the outer periphery of the main body, and the stopper is abutted against the inner surface of the guide cover in a state in which the stopper is retracted at an end of the piston opposite to the stopper, and the bearing fixing device is coaxially and axially fixed to the bearing. It is preferable to provide a configuration in which a supporting portion for supporting the guide cover is provided. In this configuration, when the stopper is retracted from the circumferential groove side of the roll shaft, the support portion abuts on the guide cover, and the main body and the inner ring retainer that form the inner surface fitted to the shaft of the bearing fixing device. Is supported so that its axis coincides with the axis on the bearing side, so that the bearing and the bearing fixing device are aligned with each other and their mutual axial positions are also restricted to fixed positions, so that they are integrated and concentric. When this integrated concentric state is fitted to the roll shaft, it can be pushed to the position where the fillet ring of the roll and the bearing inner ring are in contact with each other. , And the axial position of the circumferential groove of the roll shaft and the stopper of the bearing fixing device can be matched. Therefore, when the stopper is protruded next, it surely enters the circumferential groove.

In the bearing fixing device according to the present invention, it is preferable that the supporting portion is provided with a rolling member that can roll by contacting the inner surface of the guide cover. In this configuration, since the rolling member is provided, the bearing fixing device can be rotated with respect to the guide cover. When the key is provided on the bearing fixing device, it becomes easy to match the position of the keyway of the shaft with the key of the bearing fixing device.

In the bearing fixing device of the present invention, it is preferable that the main body is provided with a detecting means for detecting a protruding state and a retreating state of the stopper with respect to the circumferential groove (claim 8). In this configuration, since the state of the stopper that cannot be seen from the outside can be detected, the operation can be started after the state of the stopper is confirmed.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a bearing fixing device according to the present invention will be described with reference to FIGS. As shown in FIG. 1, this bearing fixing device 1 fixes a bearing (bearing device) 3 that supports a shaft (roll shaft) 2 of a rolling roll so as not to fall off the shaft. As before,
It is provided between the bearing 3 and a circumferential groove 4 provided on the roll shaft 2 at a position closer to the shaft end than the bearing. This bearing fixing device 1
Inner ring retainer 10, body 11, stopper 12, first fluid pressure driving means 13, first spring device 14, second spring device 15, second fluid pressure driving means 16, regulating means 17, guide cover 18, Supporting part 19, stopper position detecting means 20
Etc.

The bearing 3 is an ordinary double-row tapered roller bearing. As shown in FIG. 1, an inner ring 5, which is gap-fitted on a roll shaft 2, a tapered roller (not shown), an outer ring 6, a shaft box 7, It has a lid 8 and the like. The roll shaft 2 has a portion 2a to which the inner ring is fitted.
And a slightly smaller-diameter portion 2b extending outward.
It terminates at this part 2b. A circumferential groove 4 is provided on the shaft end side of the small diameter portion 2b. In addition, on the opposite side of the roll portion, there is a driven shaft portion necessary for rotationally driving the roll further extended from a portion corresponding to the similar portion 2a, 2b. The illustration on the drive shaft side is omitted. When the inner ring 5 is attached to the roll shaft 2, the inner ring 5 is fitted to the portion 2 a, one end of the inner ring 5 is in contact with a fillet ring provided on a roll portion side (not shown) of the roll shaft 2, and the other end is a bearing fixing device 1. Inner ring retainer 1
Contact 0.

As shown in FIG. 1, the inner ring retainer 10 has an inner hole 2 which is fitted to a portion 2b of the roll shaft 2 so as to be movable in the axial direction.
The bearing 3 has one end facing the shaft end side end surface of the inner ring 5 of the bearing 3, and the other end is formed on the annular piston 22 while being enlarged from the middle toward the other end.

As shown in FIG. 1, the main body 11 has an inner hole 23 which is fitted to the portion 2b of the roll shaft 2 so as to be movable in the axial direction, and a ring fitted to a position closer to the shaft end than the inner ring retainer 10. Shape. A stopper 12 and a first
Fluid pressure driving means 13, first spring device 14, second spring device 15, second fluid pressure driving means 16, regulating means 1
7, a support 19, a stopper detecting means 20, and the like.

As shown in FIGS. 1, 2 and 3, the stopper 12 is a small block which can enter and exit the circumferential groove 4 from four places on the inner peripheral surface of the main body 11. It has a predetermined length in a direction along the circumferential groove 4 with a width sufficiently smaller than the width. A recess 24 is formed in the inner peripheral surface of the main body 11 so that the stopper 12 does not protrude from the inner peripheral surface and can be retracted from the circumferential groove 4 to fit therein. And the first spring device 14 to move forward and backward. The four stoppers 12 are provided so as to project at equal intervals in the circumferential direction of the inner peripheral surface of the main body 1.

As shown in FIGS. 1, 2, and 3, the first fluid pressure driving means 13 is provided in the main body 11 and drives the stopper 12 backward at least to the inner peripheral surface of the main body. , Four sets of hydraulically-operated cylinders 25 provided at equal intervals in the circumferential direction along the radial direction of the main body 11 and corresponding to the stoppers 12, and the pistons 26 accommodated in the cylinders 25. Are connected via a piston rod 27 formed continuously. In the drawing, reference numeral 28 denotes a stopper retaining nut. 1 and 3, the lower part of the piston 26 in the cylinder 25 is a pressure chamber 29, and when the pressure oil is supplied to the pressure chamber 29 in FIG. As shown in FIG.
Retreat. As shown in FIG. 4, the supply of the pressure oil is such that a passage 30 formed in the main body 11 is connected to each pressure chamber 29, and the passage 30 is connected to the passage 30 as shown in FIGS. 2 and 5A.
One coupler 31 provided on the shaft end side of the main body 11 is connected, and the other coupler 32 that forms a pair with the coupler 31 is separately prepared and connected as necessary, and is connected to a hydraulic power source. Pressure oil can be supplied and discharged.

The first spring device 14 is provided for each stopper 12, and one of the first spring devices 14 is provided on one of the spring support holes 3 formed on both sides on the back surface of the stopper 12 as shown in FIG.
3, 33 and the recess 24 of the main body 11 so as to face the same.
And the other pair of coil springs 35, 35 housed in a compressed state in the spring support holes. In the figure, 36, 36
A screw stopper that supports the spring. This first spring device 14
Always acts so that the stopper 12 protrudes from the inner peripheral surface of the main body 11, but is weaker than the first fluid pressure driving means 13, and the first fluid pressure driving means 13 Is supplied, the stopper 12 is allowed to retreat.

As shown in FIG. 1, the second spring device 15 is provided on the main body 11 and presses the inner ring retainer 10 from the bearing 3 side to the main body side. An annular spring receiving portion 37 is provided so as to face the bearing 3 side of the piston 22, and the spring receiving portion 37 is provided.
A plurality of compressed coil springs 38 are interposed between the ring-shaped piston 22 and the annular piston 22. The coil spring 38
One end is accommodated in each of the spring receiving circular holes 39 drilled along the direction of the axis at equal intervals in the circumferential direction of the spring receiver 37,
The other end is in contact with the annular piston.

The second fluid pressure driving means 16 is composed of the annular piston 22 of the inner ring retainer 10 and an annular cylinder 40 formed in a main body corresponding to the annular piston 22 and accommodating the same. . The outer peripheral wall of the annular cylinder 40 is formed by welding the cylindrical member 41 to the main body. Instead of this welding, it is also possible to form by shaving the body part integrally. The spring receiving portion 37 is attached to an end of the cylindrical member 41 on the bearing 3 side with a screw (not shown). A packing 4 is provided on the outer periphery of the annular piston 22.
2, a packing 43 is provided on the sliding surface of the annular piston on the inner peripheral wall of the annular cylinder 40, and an annular pressure chamber 44 is formed. A passage 45 formed in the main body 11 is connected to the annular pressure chamber 44.
As shown in FIG. 5B, one coupler 46 provided on the shaft end side of the main body 11 is connected.
The other coupler 47 paired with 6 is separately prepared,
They are connected as needed to supply and discharge pressure oil from a hydraulic source. When the pressure oil is supplied to the annular pressure chamber 44, the inner ring retainer 10 and the main body 11 move in a direction in which the inner ring retainer 10 and the main body 11 are relatively separated by overcoming the action of the second spring device 15, and the bearing side end of the inner ring retainer 10 Stopper 1 for body 11
When the pressure between the position 2 and the position 2 becomes the maximum size and the pressurized oil is discharged, the inner ring retainer 10 and the main body 11 move in the direction approaching each other by the action of the second spring device 15, and the size is reduced. It is the smallest dimension. The minimum and maximum dimensions are
It is predetermined so that the stopper 12 can be moved in and out, and the inner ring retainer 10 can be pressed against the inner ring 5.

The restricting means 17 is provided on the main body 11, and restricts the axial movement position of the inner ring retainer 10 with respect to the main body by the second spring device 14 by abutting the inner ring retainer 10. The restricting means 17 includes a lock member 48 and a male screw member 49, as shown in FIGS. The lock member 48 is made of, for example, eight pins, penetrates oil-tightly at positions distributed in the circumferential direction of the main body 11 along the direction of the axis so that the main body 11 is slidable, and has one end of The piston 22 is provided so as to face the end face on the shaft end side. The male screw member 49 has a male screw 51 which is formed in an annular shape, faces the other end of the lock member 48 protruding toward the shaft end of the main body 11, and is screwed with a female screw 50 formed at the shaft end of the main body 11. An engaging hole 52 for engaging a rotating tool or a driving member is provided on the shaft end side in the radial direction. The male screw member 49 and the female screw 50
The male and female may be provided in an opposite relationship. For example, an external thread is formed on the main body 11 by setting the screwing position to an inner position than the illustrated position, and the external screw member 49 is screwed into the external thread.
May be formed in the female screw member. Further, the engagement hole 52 may be provided on the end face of the male screw member 49 along the axial direction.

The male screw member 49 is provided in the engagement hole 52
When, for example, the rotation drive member is engaged and rotated,
It is movable along the direction of the axis of the main body 11, regulates the axial end surface position of the lock member 48 at the desired movement position, and is locked by the lock key 53 at the desired movement position. The lock key 53 is a single hook-shaped member fixed to the male screw member 49 by a bolt 54. Several recesses 5 provided for the lock key 53 at predetermined intervals in the circumferential direction over the rear end surface and the outer peripheral surface of the main body 11.
5 is provided. With the bolt 54 loosened, the built-in spring 5
6, the engagement with the recess 55 is released, the male screw member 49 becomes rotatable, and the male screw member 49 is rotated so that the lock key 53 faces one of the recesses selected as the desired movement position. When the bolt 54 is tightened, it is fixed in the engaged state.

The main body 1 located inside the male screw member 49 is also provided.
As shown in FIGS. 1 and 2, four arc-shaped end members 57 are fixed at equal intervals in the circumferential direction to the shaft end side end surface by bolts 58. The stopper 12 may be formed integrally with the stopper 11.
1 forming the inner surface on the shaft end side of the recess 24 that accommodates
Part of 1. The end face member 57 is provided with a detecting means 20 for detecting the protrusion and retreat of the stopper 12. The detecting means 20 includes a detecting pin 59, a coil spring 60, and a pin receiving hole 61, and a coil spring in which one end of the detecting pin 59 is built in from a shaft end side inner surface of the recess 24 in a space where the stopper 12 has advanced. It is provided in a state where it protrudes by 60 and the other end reaches the end face on the shaft end side of the end face member 57 and does not protrude. When the stopper 12 is retracted, one end of the detection pin 59 is pushed against the coil spring 60, and the other end projects from the outer end surface of the end member 57. Therefore, the protruding state and the retreating state of the stopper 12 can be detected depending on whether the detection pin 59 protrudes from the outer end face or not. This state can be visually detected. In addition,
The detection of the state of the detection pin 59 may be performed by a detection unit such as a switch other than the visual observation.

The guide cover 18 is a cylindrical member having a size surrounding the main body 11 with a small gap therebetween. The guide cover 18 is fixed to the front cover 8 of the shaft box 7 by bolts 62 coaxially with the bearing 3. I have. The front cover 8 is fixed to the shaft box 7 by bolts 63. In the use state of the roll, the axle box 7 is fixed and the roll shaft 2 rotates, so that the main body 11 is rotated.
And the guide cover 18 do not come into contact with each other.

The support portion 19 includes the bearing fixing device 1 and the bearing 3
Bearing fixing device 1 when the shaft is removed from the roll shaft 2
Are rotatably supported by the guide cover 18 in a relationship coaxial with the bearing side and at a predetermined position with respect to the bearing in the axial direction. That is, the guide cover 18 and the support 1
Reference numeral 9 denotes a coaxial holding means for holding the bearing 3 and the bearing fixing device 1 coaxially and in a fixed positional relationship in the axial direction. The support portion 19 opens an inner hole of the main body 11 forming the cylinder 25 of the first fluid pressure driving means 13 on the outer peripheral surface of the main body, and protrudes from a side of the piston 26 opposite to the piston rod 27. It is. The support portion 19 connects the guide roller 64 as a rolling member to the piston rod 27.
The steel ball is rotatably mounted coaxially with the steel ball, and a steel ball is rotatably held on the protruding end surface. The guide roller 64 moves the main body 11 when the stopper 12 retreats.
And is supported by the inner peripheral surface of the guide cover 18. The guide roller 64 is rounded from its protruding end surface to its outer periphery, and a groove is formed in the inner peripheral surface of the guide cover 18. As a result, the main body 11 and the guide cover 18 are automatically aligned to be coaxial, and the relative positions can be determined in the axial direction.
It should be noted that even if a simple contact member is used instead of the guide roller 64, there is no problem in maintaining the coaxial state, but the key groove 66 and the key 6 as shown in FIG.
In the case where the guide roller 7 is provided, the guide roller 64 that allows the bearing fixing device 1 to easily rotate with respect to the guide cover 18 is more convenient for positioning the key and the key groove. The phantom lines 66 'and 67' in FIG. 1 indicate the planar shapes of the key groove 66 and the key 67. Reference numeral 68 denotes an oil seal, 69 denotes a seal holder, and 70 denotes a safety cover.

The thus configured bearing fixing device 1 is used as follows. First, the first fluid pressure driving means 1
When pressure oil is supplied from the couplers 32 and 31 to the pressure chamber 29 via the passage 30 to the pressure chamber 29 of the third pressure chamber 29, the operation of the piston 26 causes the stopper 12 to oppose the coil spring 35 of the first spring device 14. The guide roller 64 of the support portion 19 comes into contact with the guide surface 65 of the guide cover 18 because the guide roller 64 of the support portion 19 comes into contact with the guide surface 65 of the guide cover 18.
The main body 11 and the inner ring retainer 10 of the bearing fixing device 1 are positioned coaxially with the bearing 3 and in a fixed positional relationship with the bearing 3 in the axial direction. When the pressure oil is not supplied to the annular pressure chamber 44 of the second fluid pressure driving means 16, the inner ring retainer 10 is pressed toward the main body 11 by the coil spring 38 of the second spring device 15, and the inner ring retainer 10 is pressed. The distance between the inner ring contact side end and the position where the stopper 12 projects is minimized (see FIG. 4). This state is a preparation state for attachment and detachment. In the preparation state, the bearing fixing device 1 is fitted or removed together with the bearing 3 with respect to the shaft 2 of the roll.

At the time of mounting, the bearing 3 and the bearing fixing device 1 are fitted to the shaft 2 of the roll in the above-mentioned preparation state, and the inner ring 5 of the bearing 3 is brought into contact with the end face of the fillet ring of the roll. Become. The fitting operation at this time can be easily performed because each of the portions constituting the fitting hole is coaxially positioned and rotatably supported. That is, the key 67 of the main body 11 is previously placed at the position of the key groove 66 of the shaft 2.
When the fitting operation is performed while rotating the bearing fixing device 1 so that the positions of the bearings coincide with each other, the inner ring 5 of the bearing 3 comes into contact with the fillet ring of the roll. Next, when the pressure oil of the first fluid pressure driving means 13 is discharged (returned to the tank), the stopper 12 projects into the circumferential groove 4 by the coil spring 35 of the first spring device 14 (see FIG. 3). At this time, as described above, the distance between the end of the inner ring retainer 10 and the stopper 12 is the minimum dimension, and the main body 11 having the stopper 12 is
The stopper 12 protrudes into the circumferential groove 4 with a margin without interfering with the edge of the circumferential groove 4 because it is restrained by the guide surface 65 and the bearing 3 in a fixed positional relationship in the axial direction. The protrusion of the stopper is caused by the stopper position detecting means 20.
The detection pin 59 can be confirmed by protruding from the end face member 57.

After the stopper 12 projects, the couplers 47 and 46 are inserted into the annular pressure chamber 44 of the second fluid pressure driving device 16.
When the pressurized oil is supplied through the passage 45, the inner ring retainer 10 is driven against the coil spring 38 of the second spring device 15, and comes into contact with the inner ring 5 of the bearing 3 and the stopper 1
2 comes into contact with the side surface on the shaft end side of the circumferential groove 4 to be in a tension state. The tension state is such that the bearing inner ring 5, the inner ring retainer 10, and the annular pressure chamber 4 of the second fluid pressure driving means 16 are provided between the end face of the fillet ring of the roll and the side face on the shaft end side of the circumferential groove 4.
4, body 11, stopper 12 interposed,
In this state, the space between the body and the main body 11 is pushed open by the oil pressure of the annular pressure chamber 44. If the inner ring retainer 10 is kept in the restricted state by the restricting means 17 in this stretched state, a necessary appropriate minute gap cannot be obtained. Therefore, the restricting means 17 is once brought into contact with the inner ring retainer 10, and then the restricting state is set at a position where the distance is returned by a small dimension in a direction away from the inner ring retainer 10.

That is, the lock member 18 is moved by rotating the male screw member 49, and once brought into contact with the end face of the annular piston 22 of the inner ring retainer 10, and then returned, for example, by about 15 °, so that the lock key 53 is at the closest position. The bolt 54 is aligned with the recess 55, and the male screw member 49 is fixed to the main body 11 by the lock key 53 so that the male screw member 49 does not rotate with respect to the main body 11. By returning the male screw member 49 by about 15 °, the male screw member 49 is moved to the shaft end side (right side in FIG. 1).
Retreat by a minute dimension. When the hydraulic pressure of the second fluid pressure driving means 16 is discharged, the spring 38 of the second spring device 15
As a result, the inner ring retainer 10 moves toward the main body 11 by the above-described minute dimension, and comes into contact with the lock member 48 of the restricting means 17 and stops. That is, it is regulated. This state is the bearing fixed state shown in FIG. In this fixed state of the bearing, the inner ring 5 of the bearing 3 is moved from the side face on the shaft end side of the circumferential groove 4 to the stopper 12,
This is a state in which an axial reaction force is received through the main body 11, the male screw member 49, the lock member 48, and the inner ring retainer 10, and through the minute gap therebetween. That is, the bearing 3
The inner ring 5 is held by the bearing fixing device 1 so as to abut or oppose through the appropriate minute gap. The presence of the appropriate minute gap ensures that the lubricating oil film is present, and prevents seizure between the end face of the inner race 5 and the end face of the inner race retainer 10 which is in contact with or is opposed to the end face. In this fixed state of the bearing, the first and second fluid pressure driving means 13 and 16 are not supplied with the pressurized fluid. Therefore, there is no risk of oil leakage during the rolling operation, and there is no decrease in the fixing action due to the oil leakage.

At the time of dismounting, the dispenser is returned to the preparation state and then dismounted. That is, pressure oil is supplied to the annular pressure chamber 44 of the second fluid pressure driving means 16 to temporarily set the tension state, and by setting the tension state, the pressing means 17 in the axial direction by the second spring device 15 can control the pressing force in the axial direction. Since the state is not received, the release operation of the regulating means 17, that is, the rotation operation of the male screw member 49 becomes easy. Of course, prior to rotating the male screw member 49, the lock key 5
3 is removed from the recess 55. After the restriction means 17 is released, the annular pressure chamber 4 of the second fluid pressure drive means 16 is released.
4. Drain the pressurized oil. Thereby, the distance between the end of the inner ring retainer 10 and the stopper 12 becomes the minimum dimension. Next, when the pressurized oil is supplied to the pressure chamber 29 of the first fluid pressure driving means 13 to retract the stopper 12 from the protruding state, the state returns to the preparation state, and the bearing 3 and the bearing fixing device 1 can be removed.
The retracted state of the stopper 12 at this time can be confirmed by the detection pin 59 of the stopper position detection means 20 being retracted into the end face member 57.

The configuration, operation, and effects of the bearing fixing device 1 have been mainly described above. However, the actual usage can be used for mounting and dismounting mainly by using a conventional old handling, and an automatic or semi-automatic bearing can be used. It can also be used for switching equipment. As understood from the above description, in the former, the one in which the bearing 3 and the bearing fixing device 1 are integrated is fitted to the roll shaft 2, and at this time, both inner holes are formed with the guide cover 18. The coaxial arrangement with the support portion 19 facilitates the fitting operation. The simple operation using hydraulic pressure allows the male screw member 49 to be adjusted after the tension state, thereby greatly reducing labor and reducing the roll. It is possible to shorten the exchange time, and in the latter case, for example, a moving table that horizontally supports and fixes the roll, supports the bearing 3 and the bearing fixing device 1 from both sides, and linearly advances and retreats in the direction of the axis is used. It is possible to use the movable table with the couplers 32 and 47 and the rotation drive unit of the male screw member 49, which is easy to implement.

[0039]

According to the first aspect of the present invention, the pressure fluid is used when the bearing is attached to the roll shaft and fixed, and when the fixing is released and removed, the first fluid is used when the bearing is fixed. Since the pressurized fluid is not supplied to the second fluid pressure drive means, there is no danger of a decrease in the fixed working force due to, for example, leakage of pressurized oil during the rolling operation, and the inner circumference is prevented from falling out of the inner ring. The axial support function supported by the side surface of the groove on the axial end side is a rigid support without a direct spring, so that a reliable bearing fixed state without seizure through a predetermined appropriate minute gap can be obtained. This has the effect. According to the second aspect of the present invention, since the inner ring press presses the inner ring coaxially, it is possible to set a proper gap reliably and maintain rolling accuracy. The invention described in claim 3 has an effect that the bearing fixing device can be miniaturized, and an appropriate gap between the bearing inner ring and the inner ring pressing side member that presses the bearing inner ring can be reliably set. The invention described in claim 4 has an effect that the position adjustment by the screw member of the restricting means for restricting the axial movement position of the inner ring retainer with respect to the main body is facilitated. The invention described in claim 5 has an effect that is effective in reducing the size of the bearing fixing device of the present invention. According to the invention of claim 6, since the bearing and the bearing fixing device can be fitted to and removed from the shaft in a state where the axes are aligned and integrated as a predetermined axial positional relationship, work efficiency is improved, In particular, the fitting operation is facilitated, and the stopper is reliably protruded, so that the workability is greatly improved. According to the seventh aspect of the invention, since the positions of the key and the key groove are easily matched, the fitting operation of the bearing fixing device to the shaft is facilitated, and the workability is further improved. The invention described in claim 8 has an effect that it is possible to go to the next operation after confirming the state of the stopper, so that it is possible to go beyond one step of automation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, in which a cross-sectional position is irregular, and includes AO, OB, CD, and EF cross sections in FIG. 2;

FIG. 2 is a partial front view of the same embodiment as viewed from a roll shaft end side.

FIG. 3 is a partially broken partial front view showing one of the stoppers of the embodiment.

FIG. 4 is a sectional view taken along the line IV-IV of FIG. 2 showing a preparation state of the bearing fixing device.

5A is a partial sectional view taken along the line OG in FIG. 2, and FIG. 5B is a partial partial view taken along the line HJ in FIG.

[Explanation of symbols]

 Reference Signs List 1 shaft bristle fixing device 2 shaft (roll shaft) 3 bearing 4 circumferential groove 5 inner ring 6 outer ring 7 axle box 10 inner ring retainer 11 main body 12 stopper 13 first fluid pressure driving means 14 first spring device 15 second spring Apparatus 16 Second fluid pressure driving means 17 Restriction means 18 Guide cover 19 Support part 20 Stopper position detection means 22 Annular piston 24 Recess 25 Cylinder 26 Piston 27 Piston rod 29 Pressure chamber 30 Passage 31 Coupler 32 Coupler 35 Coil spring 37 Spring Receiver 38 Coil spring 40 Annular cylinder 44 Annular pressure chamber 45 Passage 46 Coupler 47 Coupler 48 Lock member 49 Male screw member 53 Lock key 55 Recess 59 Detection pin 64 Guide roller 65 Guide surface

Claims (8)

[Claims] 1. A rolling roll bearing fixing device provided between a bearing for supporting a shaft of a rolling roll and a circumferential groove provided on the shaft at a position closer to the shaft end than the bearing. A ring-shaped inner ring retainer fitted axially movably to the shaft and having one end facing an axial end surface of the inner ring of the bearing; and axially moving to a position closer to the shaft end than the inner ring retainer of the shaft. A ring-shaped main body fitted to the main body, a stopper provided on the main body, protruding from the inner peripheral surface of the main body into the circumferential groove by a first spring device, and the stopper provided in the main body at least inside the main body. First fluid pressure driving means for retreating to the peripheral surface, a second spring device provided on the main body for pressing the inner ring retainer toward the main body, and a second spring device provided on the main body for the inner ring retainer Against the inner ring against the spring action of A second fluid pressure driving means; and a regulating means provided on the main body and capable of adjusting an axial movement position of the inner race retainer with respect to the main body by the second spring device and abutting the inner race retainer to regulate the position. A rolling roller bearing fixing device, characterized in that: 2. A plurality of cylinders according to claim 1, wherein said first hydraulic drive means is provided at equal intervals in a radial direction of said main body and in a circumferential direction of said main body. And a plurality of the stoppers are provided corresponding to the pistons, and the pistons and the stoppers are connected to each other. 3. The bearing fixing device for a rolling roll according to claim 1, wherein the second fluid pressure driving means is formed coaxially with the main body on the inner ring pressing side of the main body. A rolling cylinder bearing fixing device, comprising: an annular cylinder portion; and an annular piston formed on the main body side of the inner ring retainer and fitted into the annular cylinder portion. 4. The rolling roll bearing fixing device according to claim 1, wherein the regulating means slidably penetrates the main body along the direction of the axis of the main body. A lock member provided with one end facing the ring presser; and a screw member that faces the other end of the lock member and is screwed to the main body to be movable in the direction of the axis of the main body. A rolling roll bearing fixing device, comprising a screw member to be locked. 5. The rolling roll bearing fixing device according to claim 2, wherein the stopper is formed at a predetermined length substantially along the circumferential groove, and an intermediate portion thereof. Is coupled to a piston rod formed integrally with the piston, the main body has a recess for receiving the stopper when the stopper is retracted, and the first spring device is provided with a piston rod coupling portion of the stopper. A bearing fixing device for a rolling roll, comprising a pair of coil springs provided between both sides and the inside of the recess facing the both sides. 6. The rolling roll bearing fixing device according to claim 2, 3, 4, or 5,
A guide cover which is formed in a cylindrical shape and covers the outer periphery of the main body at an interval and is coaxially fixed to the shaft box of the bearing is provided, an inner hole of the cylinder is opened on the outer periphery of the main body, and the stopper of the piston and the stopper are provided. At the opposite end, a support portion is provided to support the bearing fixing device coaxially with the bearing and to the guide cover at a fixed position in the axial direction by contacting the inner surface of the guide cover with the stopper retracted. A rolling roll bearing fixing device. 7. The rolling roll bearing fixing device according to claim 6, wherein the supporting portion is provided with a rolling member that can roll by contacting an inner surface of the guide cover. Rolling roll bearing fixing device. 8. The rolling roller bearing fixing device according to claim 1, 2, 3, 4, 5, 6, or 7, wherein the circle of the stopper is provided. A rolling roll bearing fixing device, wherein a detecting means for detecting a projecting state and a retreating state with respect to a circumferential groove is provided on the main body.