JP2933015B2 - Sleeve roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembling type rolling roll comprising a roll ring having excellent wear resistance and made of a hard material such as a hard metal, a hard alloy, or ceramics, which is mounted on the outer periphery of a shaft. .

[0002]

2. Description of the Related Art A roll-type roll (referred to as a "sleeve roll") in which a roll ring made of the above-described hard material is fitted to the outer periphery of a shaft, fixed by appropriate means, and rolled on the surface of the roll ring. , Actual opening 57-6570
No. 6 or Japanese Utility Model Publication No. 59
-40096, Japanese Patent Publication No. 60-20084,
Japanese Utility Model Publication No. Sho 63-3690 and Japanese Examined Patent Application Publication No. Hei 5-17405 are disclosed.

[0003] Japanese Utility Model Laid-Open No. 57-65706 discloses that
As shown in FIGS. 9 and 10, an inner ring 23 (corresponding to an inner nut of the present invention) and an outer ring 24 are arranged between the tightening nut 6 of the shaft main body 2 and the roll ring 1, and the roll ring is hydraulically driven. Is disclosed which tightens and fixes the shaft to the shaft body. The shaft main body 2 is provided with an annular protrusion 21 having notches 26 formed at regular intervals in the circumferential direction at a position close to the tightening nut 6.

[0004] The inner ring 23 has a large-diameter portion on the side of the tightening nut 6, is fitted into the notch 26 of the shaft main body 2 on the inner periphery as shown in FIG. In this configuration, a plurality of projections 22 are provided. An outer ring 24 is hermetically fitted to the outside of the inner ring 23 via an O-ring. The outer ring 24 has a ring-shaped protrusion 25 on the inner surface side. The configuration is such that a pressurized fluid introduction passage 15 that opens at the end side is provided.

With the above arrangement, by applying a pressurized fluid to the pressurized fluid introduction passage 15, the outer ring 24 is moved in the direction of pressing the roll ring 1, and the moving portion is tightened by the tightening nut 6. Strong assembly and fixing are performed.

[0006]

Problems to be Solved by the Invention
In the gazette of No. 6, the inner ring 23 receives a force such as an axial force of a hydraulic pressure in the axial direction of the shaft when assembling the sleeve roll. That is, the inner ring 23 receives the force at the projection 22. However, since the projections 22 on the inner surface side of the inner ring 23 need to alternately enter between the projections 21 of the shaft, it is impossible to provide the projections 22 over the entire inner peripheral surface of the inner ring 23. In some cases, the portion receiving the force is at most half an area or less. Further, the stress concentrates on the root portion of the protruding portion 22, so that the protruding portion is easily broken.

In a state where the sleeve roll is assembled by applying hydraulic pressure (pressurized fluid) and the hydraulic pressure is finally released, almost no force acts on the inner ring 23.
For this reason, it is in a state of being fixed only by the frictional force with the O-ring provided between the outer ring 24 and is extremely unstable.

For example, when the inner ring 23 rotates in the circumferential direction due to vibration or the like during rolling, the protrusions 22 and 2
1, the inner ring 23 may be free in the axial direction. In this case, even if hydraulic pressure is applied when removing the roll ring, the inner ring 23 moves in the axial direction of the shaft and is pressed against the tightening nut 6. As a result, the tightening nut 6
However, there is a disadvantage that it cannot be dismantled and cannot be dismantled.

In addition, the inner diameter of the roll ring is
When the inner diameter is close to the inner diameter of the shaft 2, it is difficult to secure a step between the projections 22 and 21 due to the strength of the shaft 2, and there is also a dimensional limitation that the application becomes difficult.

Further, when the roll ring or the like is fixed, the projection 22 is engaged with the projection 21 provided on the shaft in the portion formed by the inner ring 23 and the outer ring 24, and is fixed. When the hydraulic unit is rotated, it is difficult to adjust the rotation amount because it is difficult to form a contact surface or the like in the rotation direction.

When the amount of rotation becomes inappropriate and the positional relationship between the protrusions 22 and the protrusions 21 is displaced and the protrusions 22 are only partially engaged, the area receiving the axial force of the hydraulic pressure becomes smaller, and There is a problem of reliability at the time of assembling, in which the possibility that the 22 is damaged is increased. An object of the present invention is to provide a sleeve roll that has solved these problems.

[0012]

In order to solve the above-mentioned problems, the present invention provides a method in which a tightening nut and a roll ring are provided.
An inner nut having a movable sleeve arranged in a sealed shape so as to be movable outward in the axial direction of the shaft is attached by screw connection, and pressurized fluid is introduced between the movable sleeve and the inner nut. Things. It is also effective to set the outer diameter of the screw portion for the fastening nut to be smaller than the outer diameter of the screw portion for the inner nut.

[0013]

1 and 2 show a state in which a sleeve roll according to the present invention has been assembled. FIG. 2 is an enlarged view of a portion indicated by a dotted circle in FIG. The sleeve roll is a roll ring 1 (for example, having an outer diameter of 35 mm) formed using a hard material.
0 mm) is fitted on the shaft 2 and a flange 10 (for example, having a width of 40 m) provided at one end of the shaft 2 is provided.
m) and a fastening nut 6 (for example, about 50 mm in width) which is detachably attached from the other end side of the shaft 2. Further, between the tightening nut 6 and the spacer ring 3 for holding the roll ring 1, an inner nut 5 (for example, about 50 mm in width) is attached to the shaft by screw connection.

A movable sleeve 4 (for example, about 50 mm in width) that can move in the axial direction is provided outside the inner nut 5 in the O-ring 1.
1 are fitted in a sealed shape. The movable sleeve 4 has an inner diameter portion 41 fitted to the small diameter portion 51 of the inner nut 5 and an inner diameter portion 42 fitted to the large diameter portion 52 of the inner nut 5, and is pressurized by the inner nut 5 and the movable sleeve 4. The space 12 for introducing the fluid is formed.

At first, the assembly of the sleeve roll of the present invention is as follows.
Roll ring 1 (for example, about 70 mm in width) formed using a hard material on the outer periphery of shaft 2, spacer ring 3
(For example, about 70 mm in width, but the one between the roll rings is 1
(Approximately 40 mm). The spacer ring is not essential, and a spacer ring without a spacer ring may be used.

Next, the inner nut 5 fitted with the movable sleeve 4 is screwed into the threaded portion 13 of the shaft until the inner nut 5 hits the shaft step portion 14 or the front end of the movable sleeve 4 hits the spacer ring 3 (FIG. 3).
Next, the tightening nut 6 is screwed into the screw portion 13 until it contacts the rear end of the movable sleeve 4.

The interval (1) 27 and the interval (2) 28 in FIG.
In both cases, a sufficient interval is necessary for the movable sleeve 4 to move when hydraulic pressure is applied to the pressurized fluid introduction space 12 as shown below, and the interval 28 is set wider than the interval 27. .

After the predetermined assembly has been performed, pressure is applied by hydraulic pressure through a pressurized fluid introduction passage 15 provided in the movable sleeve 4. With this pressure, the movable sleeve 4 moves the roll ring 1 and the spacer ring 3 to the flange 10 side. A gap is generated between the tightening nut 6 and the movable sleeve 4 by the amount moved. The tightening nut 6 can be further tightened by the amount of the gap (FIG. 2). Thereafter, if the pressure in the pressurized fluid introduction space 12 is reduced, the roll ring 1 and the spacer ring 3 are firmly fixed.

It is necessary that a slight gap 28 remains even when the sleeve roll assembly is completed. That is, when the sleeve roll is assembled and then hydraulic pressure is applied during disassembly, the hydraulic pressure is effectively operated, that is, the movable sleeve 4 is moved and the tightening nut 6 is loosened. If the gap 28 does not remain when the assembly is completed, there is a risk that the sleeve roll cannot be dismantled.

According to the present invention, it is possible to avoid a double-sided nut structure (for example, Japanese Utility Model Publication No. 59-40096). become. Further, the size of the small diameter portion 51 of the inner nut 5 can be made smaller than the outer diameter of the shaft at the fitting portion of the spacer ring 3 or the roll ring 1, and the pressurized fluid introduction space is set to be larger in the shaft radial direction. As a result, the working area of the pressurized fluid increases, and as a result, a larger fixing force can be obtained at the same pressure.

In FIG. 4, the outer diameter of the screw 19 of the shaft to which the tightening nut 6 is screwed is smaller than the outer diameter of the screw 8 to which the inner nut 5 is screwed. I have.

Therefore, the screw portion of the inner nut 5 can be fitted without touching the outer end of the screw 19 for the tightening nut, so that the inner nut 5 is merely screwed into the screw portion 8 for the inner nut, and the screwing distance is reduced. Can be shortened. Therefore, since the screw can be screwed in a short time, the setup time can be reduced.

FIG. 5 shows an elastic member 16 such as a leaf spring which stores axial repulsive energy on the outer periphery of the shaft 2 between the spacer ring 3 and the flange member 10.
It is provided via a protective spacer ring 17 for preventing deformation of the zero.

The assembly of the sleeve roll in FIG. 5 is performed in the same manner as in FIG. 1, ie, the case where the main part is shown in FIGS. 2 and 3, but finally the pressure in the pressurized fluid introduction space 12 is reduced. Then, the elastically deformed elastic member 16 is restored,
The roll ring 1 and the spacer ring 3 are firmly fixed by the elastic force due to the restoration. Variations in the fixing force of the roll ring caused by thermal expansion of the entire sleeve roll during use can also be suppressed.

In FIG. 6, a roll ring 1 made of a hard material is sandwiched between tapered spacer rings 18 made of other materials. In this case, shaft 2
The concentricity between the roll ring 1 and the roll ring 1 is improved, and a compressive stress acts in the circumferential direction of the roll ring, so that the accuracy of the rolled material can be improved and the roll ring can be prevented from being damaged.

In FIG. 7, the flange member 10 is formed in a nut shape and is fixed to the shaft 2 by screws.

FIG. 8 shows a fillet ring 7.
A tightening nut 9 integrally formed with a screw 19 (a protection for preventing damage to the bearing and the like due to entry of foreign matter into the bearing that supports the rotation of the sleeve roll) is fixed to the screw 19. The time for attaching the fillet ring 7 becomes unnecessary, and as a result, the setup time can be reduced. That is, when the tightening nut and the fillet ring are integrally formed, the work of attaching and detaching the fillet ring when the sleeve roll is attached and detached is omitted.

[0028]

According to the present invention, the inner nut is attached to the shaft main body by screw connection, and the inner nut is mounted on the shaft main body (actual opening 57-65).
No. 706), the force is dispersed by screws, so that damage due to stress concentration on the root of the projection is reduced, and the strength is stabilized. . Also, merely by screwing the shaft portion, etc., there are few dimensional restrictions on the entire shaft as shown by attaching a step or a flange due to a large projection to the shaft (Japanese Utility Model Publication No. 59-4096). There is no loss of original strength.

Further, in the assembled state of the present invention, the inner nut is sandwiched between the tightening nut and the shaft, so that the inner nut rotates and moves in the axial direction of the shaft. No, and therefore, it cannot be dismantled.

According to the present invention, as described above, not only can the roll ring made of a hard material be firmly fixed to the shaft, but also the roll ring can be easily attached and detached, and the mounting strength of the hydraulic mechanism for attaching and detaching to the shaft can be improved. It has excellent stability. Furthermore, since the shaft is not subjected to any processing that impairs the strength of the shaft itself, the strength of the sleeve roll is high.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 shows a state before the hydraulic pressure of FIG. 2 is applied.

FIG. 4 is a view showing an embodiment in which the outer diameter of the shaft nut screw for the fastening nut is smaller than the outer diameter of the shaft screw for the inner nut.

FIG. 5 is a view using an elastic member.

FIG. 6 is a view using a tapered spacer ring.

FIG. 7 is a diagram in which a flange is fixed to a shaft with a screw.

FIG. 8 is a view showing an embodiment in which a fillet ring and a tightening nut are formed integrally.

FIG. 9 is a conventional configuration diagram.

FIG. 10 is a partially enlarged sectional view of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Roll ring 2 ... Shaft 3 ... Spacer ring 4 ... Movable sleeve 5 ... Inner nut 6 ... Tightening nut 7 ... Fillet ring 8 ... Inner nut part screw Part 9: Fillet ring integrated nut 10: Flange 11: O-ring 12: Pressurized fluid introduction space 13: Common screw part for tightening nut and inner nut 14: Shaft step 15 ··· Pressurized fluid introduction passage 16 ··· elastic member 17 ··· protective spacer ring 18 ··· taper spacer ring 19 ··· screw part for tightening nut 27 ··· spacing (1) 28 ··· spacing 2) 41, 42: Inside diameter of movable sleeve 51: Small diameter part of inner nut 52: Large diameter part of inner nut

Claims (2)

(57) [Claims] 1. A sleeve for fastening a roll ring formed of a hard material between a flange fixed to one side of a shaft on the outer periphery of a shaft and a tightening nut provided on the other side of the shaft. In the roll, an inner nut having a movable sleeve arranged in a sealed shape so as to be movable in the axial direction of the shaft outward is attached between the tightening nut and the roll ring by screw connection, and a cap is provided between the movable sleeve and the inner nut. A sleeve roll configured to introduce a pressurized fluid. 2. The sleeve roll according to claim 1, wherein an outer diameter of the screw portion for the fastening nut according to claim 1 is smaller than an outer diameter of the screw portion for the inner nut.