JPH06517A - Equipment for disassembling and assembling bearings for rotating machines such as rolls - Google Patents

Abstract

(57) [Summary] [Purpose] Make it easier to disassemble and assemble the bearings of rotating machines such as rolls. [Structure] A screw jack is provided at the center of a trolley that can freely move in a horizontal plane of a work floor, and an upper plate that can be raised and lowered by the jack is provided, and a support device having springs built in at four corners of the upper plate is provided. A holding device having a rail-shaped projection on the top surface of the top plate. Also, a bearing attaching / detaching device configured by an expansion / contraction shaft, a hydraulic jack for expanding / contracting the expansion / contraction shaft, a bearing receiver, a tension rod, and a disc that can be inserted into the distal end of the expansion / contraction shaft and fixed with a stopper on a platform that can be moved up and down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing disassembling and assembling apparatus for disassembling and assembling a bearing portion of a rotating machine such as a roll, and more particularly to a holding device for mounting the bearing portion and a bearing portion bearing attaching / detaching device. Is.

[0002]

2. Description of the Related Art Conventional roll / bearing attachment / detachment work is a work using a lifting machine such as a crane on a fixed stand, and there is no device or work procedure similar to the present invention, and a heavy bearing In this case, the bearing was pulled out by a jig such as a jack with a claw while supporting it with a lifting machine such as a crane to prevent it from falling. Further, the insertion of the bearing is mainly performed by manual work relying on experience and intuition while correcting the biased indentation by tapping the bearing with a hammer or the like.

[0003]

The above-described conventional work needs to be performed by a plurality of people (crane operation, bearing attachment / detachment, work assistance, etc.), which results in poor work efficiency, and the work of inserting the bearing is It was difficult to align the center, and many trials and errors were inefficient, resulting in a work that required considerable skill. Moreover, the bearing may be damaged depending on the handling.

The present invention has been made in order to essentially solve such a conventional manual work, in which the roll and the bearing safely placed on the workbench are centered between the roll and the bearing. An object of the present invention is to provide an apparatus for disassembling and assembling a bearing portion of a rotating machine such as a roll, which can be easily attached and detached by one operator.

[0005]

A first object of the present invention is to dispose a top plate which can be moved up and down via a screw jack in the center of a carriage which can freely move in a plane of a horizontal work floor. A support device having springs built-in is provided at four corners of the face plate, and rail-shaped projections fitted to the recessed grooves provided at the bottom of the bearing are provided on the top plate. The gist is the holding device for disassembling and assembling the bearing.

A second aspect of the present invention is capable of raising and lowering a cylindrical bearing receiver that is slightly smaller than the inner diameter of the bearing that can be inserted into the bearing, with respect to the bearing consisting of the bearing box and the bearing whose central axis is oriented horizontally. It is installed on a pedestal, and a telescopic shaft that is expandable and contractible in the axial direction and has a disc with a diameter slightly smaller than the bearing end face diameter at the tip is detachable inside the bearing pedestal and supports the bearing pedestal. A bearing attaching / detaching device for disassembling and assembling a bearing of a rotating machine such as a roll is characterized in that an expandable / contractible tension bar capable of pressing only a bearing box in a horizontal direction is attached to a plurality of positions of.

[0007]

In the first holding device of the present invention, when the bearing box is pulled out, the top plate is raised by the screw jack so that the projection of the top plate fits into the groove on the bottom surface of the bearing box, and the core of the holding device is lifted. Align them, pull out the bearing box, and move it to the next location with it placed.

In the second attaching / detaching device of the present invention, when the bearing is pulled out from the bearing box placed on the holding device or the bearing is inserted, the entire height is adjusted, and then the bearing inner diameter is adjusted. Insert the bearing receiver into and attach the disc to the tip of the telescopic shaft, and pull the telescopic shaft in the axial direction to pull out the bearing. At this time, the tension rod firmly supports the bearing box. Installation of a new bearing in the bearing housing is the reverse of extraction.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The structure of the present invention has a space for several rolls, and is as flat and smooth as possible on a work desk (work floor when the roll is large), and a roll holder on which a bearing box can be placed in a floating state. It consists of a frame, a holding device for laterally carrying the bearing box, and a detaching device for detaching the bearing in the bearing box. Of these, it is desirable to fix them at.

The holding device S has a structure as shown in FIG. The upper surface plate 5 is rigidly supported by the spherical jack head 9 at the center of the carriage S1 at only one point, but is elastically supported at the four corners by the supporting device 6A having the spring 6 built therein. The jack head 9 is raised and lowered by the screw jack 8 to raise and lower the upper plate 5 to a predetermined level. Furthermore,
A rail-shaped projection 5A is provided on the top surface of the upper plate 5,
The projection is adapted to fit into a groove provided on the bottom surface of the bearing box to be placed. A free spherical roller 7 is attached to the lowermost part of the trolley so that it can freely move on the work floor.

The bearing attaching / detaching device has a structure as shown in FIG. That is, a telescopic shaft 1 and a hydraulic jack 2 for driving the telescopic shaft 1,
A bearing receiver 3 is provided eccentrically about 5 mm above the center of the telescopic shaft 1 (its diameter is 5 mm larger than the inner diameter of the target bearing).
and a stretchable rod 4 which is held in contact with the bearing box when the bearing is pulled out. The telescopic shaft 1, the bearing receiver 3, and the tension rod 4 are attached to the front surface of the pedestal 10 so as to be oriented in the same direction as illustrated, and the hydraulic jack 2 is provided on the same axis as the telescopic shaft 1. Further, two or more tension rods 4 are provided and are expanded and contracted by, for example, a cylinder.

The procedure for attaching and detaching the roll bearing, which is carried out by using these devices, will be described in sequence. First, when pulling out the bearing box from the shaft, the projection 5A is fitted into the concave groove JA on the lower surface of the bearing box J which is placed in a state where the holding device S is floated by the roll placing frame as shown in FIG. The screw jack 8 is inserted and the upper plate 5 of the holding device S is brought into close contact with the lower surface of the bearing box J. This operation aligns the holding device S with the roll. Note that the screw jack 8 is not moved after the centering is performed here until the bearing box is completely inserted again.

The bearing box J can be pulled out by hand after mounting it on the holding device S or by using a jack with a claw. The bearing box J taken out is moved to a bearing attaching / detaching device which will be described later, while being placed on the holding device S.
The bearing is removed.

The bearing is extracted in the manner shown in FIG. The bearing box J is moved in the direction of arrow 21 and applied to the projecting rod 4, and the carriage is stopped at a position where the telescopic shaft 1 and the bearing receiver 3 are inserted into the bearing portion of the bearing box. Next, the bearing attaching / detaching device B is arranged so that the upper portion of the bearing receiver 3 may abut against the upper portion of the inner diameter of the bearing inner ring in the bearing box J.
The pedestal 10 is set up and down. Then, the disk 11 is inserted into the tip end of the telescopic shaft 1 and the stopper 12 is fitted and fixed in the recess 1A. Operate the hydraulic jack 2 in this state,
The bearing is pulled out from the bearing housing by moving the telescopic shaft 1 so as to pull it backward. At the time of extraction, the projecting rod 4 holds the bearing box J against the tension of the telescopic shaft 1. Here, the bearing attaching / detaching device B is not moved up and down until one cycle up to the insertion of the bearing is completed.

On the contrary, the bearing is inserted in the manner shown in FIG. First, install the new bearing B1 into the bearing receiver 3
Put on. As a result, the bearing B1 is suspended from the bearing receiver 3 and self-aligned. When the left and right sides of the bearing box J and the bearing B1 are aligned with each other in this state, the insertion is completed only by operating the hydraulic jack 2. In this case, just before inserting the bearing into the bearing box J, the extended telescopic shaft 1 has its tip at a position protruding from the bearing box J, and a disk 11 larger than the inner diameter of the bearing box J is provided at this tip. After stopping with the stopper 12, the hydraulic jack 2 is operated to push the bearing box J into the bearing. Finally, the insertion of the bearing housing into the roll is carried out by the reverse operation of the withdrawal described at the beginning.

[0016]

As described above, according to the present invention, the manual operation is not required, and the roll and the bearing safely placed on the workbench are centered between the roll and the bearing and detached by one operator. Can be done easily. In addition, the present invention has a structure in which the height of the holding device and the height of the bearing attaching / detaching device are successively transferred from the center of the roll that is temporarily placed as the maintenance progresses. This saves labor and realizes smooth insertion by the structure for fine alignment (following structure by one-point support of the holding device). Therefore, according to the present invention, if the roll holder frame, the collar, etc. are held in series, the roll diameter is 400 mm and the bearing box weight is 100 kg
Can be used for roll maintenance up to a certain degree.

[Brief description of drawings]

FIG. 1 is an assembly structure diagram of a holding device according to the present invention.

FIG. 2 is an explanatory view of using the holding device of FIG.

FIG. 3 is an external view of a bearing attaching / detaching device according to the present invention.

FIG. 4 is an illustration of bearing separation by a bearing attaching / detaching device.

FIG. 5 is an illustration of mounting the bearing by the bearing attaching / detaching device.

[Explanation of symbols]

 1 Telescopic shaft 2 Hydraulic jack 3 Bearing 4 Stretching rod 5 Top plate 6 Spring 6A Support device 7 Free spherical roller 8 Screw jack 9 Jack head 10 Frame 11 Disc 12 Stopper B Bearing attaching / detaching device B1 Bearing box S Holding device S1 truck

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hidehiro Kashiwamura, 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Co., Ltd. Kimitsu Steel Co., Ltd. Stock company Kimitsu Works (72) Inventor Shin Ogawa 197 Hachiman, Futtsu, Chiba Taihei Kogyo Co., Ltd., Kimitsu Branch

Claims (2)

[Claims] 1. A support device in which an upper surface plate that can be moved up and down via a screw jack is arranged at the center of a carriage that can freely move in a plane of a horizontal work floor, and springs are built in four corners of the upper surface plate. And a rail-shaped projection that fits into a groove provided at the bottom of the bearing, the holding device for disassembling and assembling the bearing of a rotating machine such as a roll. 2. A bearing, which comprises a bearing box and a bearing whose central axis is oriented in the horizontal direction, is installed on a pedestal capable of ascending and descending a cylindrical bearing receiver that is slightly smaller than the inner diameter of the bearing that can be inserted into the bearing. Inside the bearing receiver, an expandable shaft which is expandable and contractible in the axial direction and at the tip of which a disk having a diameter slightly smaller than the bearing end face diameter is detachably mounted is arranged, and the bearing box is provided at a plurality of positions of the mount supporting the bearing receiver. A bearing attachment / detachment device for disassembling and assembling bearings for rotating machines such as rolls, which is equipped with an extendable tension rod that can press only the horizontal direction.