JPS59156510A - Shaft joint for power transmission - Google Patents

Abstract

PURPOSE:To provide a titled joint which has a roll shifting function with a simple construction and permits easy maintenance and inspection by constituting so that an inside cylindrical member is inserted and connected movably forward and backward in an outside cylindrical member to form an expanding and contacting body and pressing force is acted at all times on the expanding and contacting body by means of an elastic body. CONSTITUTION:An inside cylinder 18 connected with an intermediate shaft 19 is inserted and connected to the inside of an outside cylinder 16 connecting to a driving machine (not shown in a figure) in a joint for power transmission which transmits driving power to the roll of a rolling mill in follow up to the axial shifting of the roll. ON the other hand, an inside cylinder 20 is inserted and connected to the inside of an outside cylinder 22 connecting to the roll (not shown in the figure) of the rolling mill and an inside cylinder 20 is inserted movably forward and backward into the inside of said intermediate shaft 19 and is coupled with a gear connecting part 21, thereby constituting a power transmission part. A rod 24 for energizing the cylinder 20 to the cylinder 22 side by an elastic mechanism constituted of guides 25A-D and spring 26A-C is penetrated in said inside cylinder and the roll shift is absorbed by the rod 24 provided with the elastic function via a plate 29 and a button 30 provided at the top end of the cylinder 22.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a power transmission joint in a rolling mill, and more particularly to a power transmission shaft joint having a function of following the roll shift of a rolling mill.

[Prior art]

FIGS. 1 and 2 show an example of the structure of a conventional power transmission shaft joint of this type. The spindle 1 is connected to the shaft end of a roll 2 in a rolling mill via a joint 3, and the spindle 1 is supported by bearings 4A, 4B and 9. Bearings 4A and 4B are each cylinder 5A
, 5B, and these cylinders 5A, 5B
are fixed to pillars 6A and 6B. These pillars 6A.

6B is a cylinder 8 attached to support stands 7A and 7B.
It is supported by A and 8B. "Therefore, the shift of the roll 2 was followed by driving the cylinders 5A and 5B to move the bearings 4A and 4B, and also by causing the spindle 1 to respond in the axial direction. The device had the following drawbacks: the large size of the device increased equipment costs, and the complicated adjustment required made it difficult to handle.The complicated mechanism and many sliding parts required frequent maintenance and inspection. In addition to this, since the moving part by the spindle shift is the drive gear side, a large cover for strong lubrication is required, which worsens maintenance and inspection.The complicated mechanism makes maintenance difficult. There is not enough inspection space, workability is poor, and a lot of maintenance and inspection time is required.

In addition, as shown in FIG. 3, which is a detailed partial view of FIG. 1, since the gear center X and the button contact surface Y do not coincide, the spindle outer cylinder 10 slips on the button contact surface Y when it is tilted. , which causes abnormal noise.

Since this button contact surface Y is the center of rotation, lubricity is a problem and it is difficult to take measures to prevent abnormal noise.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a power transmission shaft coupling which eliminates the above-mentioned drawbacks, has a simple structure, has a roll shift function, and is easy to maintain and inspect.

[Summary of the Invention] The present invention provides a shaft coupling for transmitting power to a rolling mill having a roll shift function, in which a telescopic body that can automatically follow the roll shift is built into the shaft coupling, and a pressing force is constantly applied to the rolls. By applying this function, the incomplete fitting of the roll oval part is resolved, and by changing the extension/contraction position of the shaft joint, strong lubrication is changed to oil bath type lubrication, and the center of the gear of the shaft joint and the center of the button are aligned. By doing so, the above objectives will be achieved.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 4 is a configuration diagram showing an embodiment of the entire rolling equipment using the power transmission shaft coupling of the present invention. A driving machine 14 is connected to a rolling mill 12 with a built-in roll 11 via a power transmission joint 13.
Power is transmitted from the roller 11 to rotate the roll 11. A power source 15 is connected to the drive machine 14 .

FIG. 5 is a detailed configuration diagram showing an embodiment of the power transmission shaft joint of the present invention shown in FIG. 4. An inner cylinder 17 is inserted and connected inside the outer cylinder 16, and the outer cylinder part of the inner cylinder 17 and the outer cylinder 1 are connected to each other.
A bellows 18 is provided between the tip of the inner cylinder 1 and the tip of the inner cylinder 1.
It absorbs the axial movement of 7. An intermediate shaft 19 is fastened to the inner cylinder 17. An inner cylinder 20 is inserted into the intermediate shaft 19 so as to be movable, and the intermediate shaft 19 and the inner cylinder 20
0 are connected at a gear connecting portion 21. The other end of the inner cylinder 20 is inserted and connected to the inside of the outer cylinder 22, and a bellows 23 is provided between the outer circumferential part of the inner cylinder 20 and the tip of the outer cylinder 22, and the axial direction of the inner cylinder 20 is It absorbs movement. Spring guides 25A, 25B, 25C, and 25D are inserted inside the inner cylinder 20 to support a rod 24 passing through the inner cylinder 20.
5C.

Spring 26A, 26B, 26C is loaded between 25D. A plate 27 is fixed to the end of the outer cylinder 16, and a button 28 is fixed to the center thereof. Further, a plate 29 is fixed to the end of the outer cylinder 22, and a button 30 is fixed to the center thereof. A spring 26 is attached to the end of the rod 24 on the outer cylinder 16 side.
A, 26B.

The ring 31 and nut 32 that adjust the biasing force of 26C are attached. Further, a button 33 is fixed to the inner cylinder 17.

The outer cylinder 16 is connected to the drive unit 14 shown in FIG. 4, and the opening 11 shown in FIG. 4 is fitted into the outer cylinder 22.

The driving force of the outer cylinder 16 is the inner cylinder 17, the intermediate shaft 19, the inner cylinder 20,
It is transmitted to the outer cylinder 22 and drives the roll 11. Also, springs 26A and 26B.

The rod 24 exerts a pressing force on the roll 11 via the button 30, plate 29, and outer cylinder 22 due to the urging force of 26C.

FIG. 6 is a partially enlarged detailed view of FIG. 5, and as shown in the figure, in this embodiment, the gear teeth engagement center
Matches above.

Next, the roll shift following function of this embodiment will be explained. FIG. 5 shows a state in which the power transmission shaft joint 13 is fully extended. In order to shorten the power transmission shaft joint 13 by t using the roll shift mechanism, shift the roll 11 to the left in the figure. 30, the rod 24 is moved to the left in the figure by L, and this movement causes lot 2
The tip end portion of No. 4 on the outer cylinder 16 side moves to the position shown by the two-dot chain line in the figure. At this time, the distance between the spring guides 25A and 25D is shortened by t, which is the spring 26A.

Absorbs at 26B and 26C. At the same time, as the outer cylinder 22 moves to the left, the inner cylinder 20 moves to the left by t, and the inner cylinder 1
The distance between the outer cylinder 16 and the outer cylinder 22 is shortened by t, and the distance between the outer cylinder 16 and the outer cylinder 22 is shortened by t.
Follows an axial shift of 1. When the shaft joint 13 is extended in the opposite direction, the springs 26A, 26B, and 26C are extended and the rod 24 is moved to the left in the figure.

According to this embodiment, the inner cylinder 20 is inserted and fitted inside the inner cylinder 17 and the intermediate shaft 19 connected to the outer cylinder 16 so as to be movable in the axial direction, and the other end of the inner cylinder 20 is connected to the outer cylinder. 22, the roll shift function of absorbing the shift of the roll 11 by the forward movement of the inner cylinder 20 can be realized with a simple configuration. There is no need for maintenance and inspection, and there is sufficient space for maintenance and inspection, which has the effect of improving the workability of maintenance and inspection.

Furthermore, since the structure of the device is simple, it has the effect of reducing equipment costs, and it also has the effect of improving ease of handling since it does not require complicated adjustments. Furthermore, during roll shift,
In addition, since the meshing part between the inner cylinder 20 and the intermediate shaft 19 has a structure that expands and contracts, an oil bath type lubrication method can be used for lubrication of this part, and this part also has a simplified structure and requires maintenance in the same way as above. This has the effect of greatly improving inspection efficiency. Also, a button 28, a rod 24, which applies pressing force to the roll 11,
By aligning the contact surfaces of the buttons 31 and -buttons 30 with the gear meshing center as shown in FIG. 6, it is possible to completely prevent the generation of abnormal noise, and to prevent relative slippage of the button contact surfaces. As a result, the life of the button can be improved.

Furthermore, an appropriate pressing force always acts between the roll 11 and the shaft coupling 13, eliminating incomplete fitting between the roll 11 and the outer cylinder 22, and improving the reliability of the equipment.

FIG. 7 is a configuration diagram showing another embodiment of the power transmission shaft joint of the present invention. An inner cylinder 34 is inserted and connected to the inside of the outer cylinder 16 so as to be movable in the axial direction.The other end of the inner cylinder 34 is inserted into an intermediate shaft 35, and the intermediate shaft 35 and the inner cylinder 34 are connected to the cover 36. Fixed. The other end of the intermediate shaft 35 has an inner lN
37 are inserted and connected, and this inner cylinder 37 and intermediate shaft 35 are fixed by a cover 38. The other end of the inner cylinder 37 is the outer cylinder 2
A bellows 39 is attached between the outer periphery of the inner cylinder 37 and the tip of the outer cylinder 22. Spring kites 41A to 41E are inserted inside the inner cylinders 34 and 37 and the intermediate shaft 35 to support a rod 40 passing through the inner cylinder 34 and the intermediate shaft 35. Springs 42A to 42D are loaded between 41E. A thrust receiver 43 is provided at the inner center of the outer cylinder 16, and a thrust receiver 44 is also provided at the center of the end of the inner cylinder 37 on the outer cylinder 22 side. Further, a ring 45 and a nut 46 for adjusting the setting force (biasing force of the springs) of the springs 42A to 42D and the shift amount of the rod 40 are attached to the tip end of the rod 40 on the inner cylinder 37 side.

The outer tube 16 is connected to the drive machine 14 shown in FIG. 5, and the outer tube 22 is fitted with the roll 11 shown in FIG. The driving force of the outer cylinder 16 is transmitted to the inner cylinder 34, the intermediate shaft 35, the inner cylinder 37, and the outer cylinder 22, and drives the roll 11.

Next, the roll shift function of this embodiment will be explained. First, when the roll 11 is shifted by 10 t in the right direction in the figure, the power transmission shaft joint 13 is shifted by +t in the extension direction and moves to the right in the figure to follow the shift of the roll 11. That is, the outer cylinder 2
2 moves to the right in the figure by t, the spring guide 41A
~41E and preset springs 42A~42D
However, the thrust receiver 43 of the outer cylinder 16 fixed to the drive machine 14
The ring 45 and the nut 46 extend along the center grooves of the inner cylinders 34, 37 and the intermediate shaft 35 until the gap B between the ring 45 and the nut 46 becomes zero. At the same time, the outer cylinder 16 and the inner cylinder 34 slide and A>B=0, and the distance between the outer cylinder 16 and the outer cylinder 22 is extended by +t, and the power transmission shaft coupling 13 shifts the roll 11. Follow.

On the other hand, when the roll 11 is shifted by -t in the left direction in the drawing, based on the relationship C;>D>t, the springs 42A to 42D are compressed, contrary to the above shift of +t. The inner cylinder 34 slides into the outer cylinder 16 and the distance between the outer cylinder 16 and the outer cylinder 22 is reduced by -t 9, and the power transmission shaft joint 13 follows the shift of the roll 11. In addition, the outer cylinder 22 and the roll 11
A pressing force always acts between them, and the power transmission shaft joint 13 of this embodiment can accurately follow even minute movements of the roll 11.

This embodiment also has the same effects as the previous embodiment.

〔Effect of the invention〕

As described above, according to the power transmission shaft coupling of the present invention,
The shaft joint is constructed by inserting and connecting the inner cylindrical member into the outer cylindrical member, and these two members slide and move in the axial direction, making it freely extendable, making it possible to realize the roll shift function with a simple structure. In addition, the efficiency of maintenance and inspection work can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of a conventional power transmission shaft coupling;
Fig. 2 is a front view of Fig. 1, Fig. 3 is a partially detailed enlarged view of Fig. 1, and Fig. 4 shows an embodiment of the entire rolling mill equipment to which the power transmission shaft coupling of the present invention is applied. 5 is a configuration diagram showing an embodiment of the power transmission shaft coupling of the present invention, FIG. 6 is a partially detailed enlarged view of FIG. 5, and FIG. FIG. 16.22...Outer cylinder, 17,20,34.37...
Inner cylinder, 19.35... Intermediate shaft, 24.40... Rod, 25A, 25B, 25C, 41A-41E... Spring guide, 26A, 26B, 26C, 42A-42D.
...Spring, 28, 30.33...Button. 2nd eye 3rd figure 0 4th mouth/2

Claims (1)

[Scope of Claims] 1. In a power transmission shaft coupling that transmits power to a roll of a rolling mill by following the axial shift of the roll, an inner cylinder member is inserted and connected to the outer cylinder member so as to be movable. 1. A shaft joint for power transmission, characterized in that the elastic body is provided with an elastic body that constantly applies a pressing force to the roll. 2. The power transmission shaft joint according to claim 1, wherein the sliding portion of the expandable body is lubricated by an oil bath. 3. Claims characterized in that the expandable body has a button for transmitting moving force thereto, and the center of this button is aligned with the center of a gear that transmits rotational force to each part of the shaft joint. The power transmission shaft coupling according to item 1.