JPS6016849B2 - Support device for universal joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for supporting a universal joint when the driven rotating shaft and the universal joint are separated, and particularly to a device for supporting the universal joint when the driven rotating shaft and the universal joint are separated, and in particular, the present invention relates to a device for supporting the universal joint when the driven rotating shaft and the universal joint are separated. It is suitable for use with dislocated universal joints.

Some rolling mills are known in which rolling rolls of various diameters can be exchanged for the purpose of changing the rolling reduction rate and the plate quality of the rolled part, and in particular, those of the drive rotation type are capable of changing the rolling roll gap. In many cases, a universal joint is used between the rolling roll and its drive device so that the rolling roll can be adjusted as desired.

Therefore, such rolling mills require a support device to hold the universal joint in a fixed position while the roll is removed from the universal joint and a new roll is connected to the universal joint. Such a conventional support device for a universal joint is shown in FIG. 1a and FIG.
This universal joint 3 is made by pinching and gripping the coupling part (coupling boss) 4 and main body (spindle) 5 of the universal joint 3 which are iron-coupled with the roll neck 2 of the universal joint 3 from both left and right sides.
The structure supports the

In this remounting, in order to adjust the vertical positional deviation between the roll neck 2 of the rolling roll 1 and the coupling part 4 of the universal joint 3, a gripping member (rest arm) 6 that can move toward and away from each other is installed. A balance mechanism is incorporated which supports each of them so as to be movable up and down by a balance spring 7. Therefore, if a problem occurs with the initial balance setting, the spring force of the balance spring 7 must be readjusted.
In particular, since many of the universal joints 3 incorporated into rolling mills are large, the spring force of the balance spring 7 used therein becomes extremely large, and readjustment of the spring force is extremely difficult. In addition, if the roll neck 2 of the rolling roll 1 is deviated from the left or right with respect to the coupling portion 4 of the universal joint 3, the coupling of the universal joint 3 may exceed the pressing force of the hydraulic cylinder 8 that operates the gripping member 6. Since the part 4 has to be shifted left and right, it is difficult to smoothly engage the roll neck 2 and the coupling part 4, and it is necessary to increase the output of the roll moving device for changing the rolls. In addition, the reference numeral 9 in the figure is a vertically movable mounting seat for mounting the gripping member 6 and the hydraulic cylinder 8 on the balance spring 7, and the reference numeral 10 is a mounting seat that is vertically movable for mounting the gripping member 6 and the hydraulic cylinder 8 on the balance spring 7. This is a speed reducer that is used during maintenance. The present invention eliminates various drawbacks of such conventional universal joint support devices, makes it possible to extremely easily engage the coupling portion of the universal joint with the driven rotating shaft, and also to improve the balance spring in the balance mechanism. It is an object of the present invention to provide a support device for a universal joint whose spring force can be adjusted quickly and easily.

The structure of the support layer for a universal joint of the present invention that achieves this object is such that the side of the universal joint has a coupling portion that is connected to a drive source at one end and removably connected to a driven rotating shaft at the other end. a frame-shaped main body installed on one side; a support arm on which the universal joint is mounted and rotatably fixed to the main body by a pin parallel to the driven rotation axis; , a drive arm rotatably pivoted to the main body by a pin parallel to the pin;
A drive member for rotating the drive arm, a spring shaft that passes through a spring seat formed on the support arm and has one end pivoted to the drive arm, and an adjustment screwed into the other end of the spring shaft. and a compression spring interposed on the spring shaft between the spring receiving seat and the adjustment nut. Hereinafter, an embodiment in which the support device for a universal joint according to the present invention is applied to a cross-pin type universal joint incorporated in a rolling mill of a driving rotation type will be described in detail with reference to the drawings from FIG. 2 onwards.

FIG. 2a shows the front shape of this embodiment, FIG. 2b shows the right side shape, and FIG. 3a shows an enlarged view of the main part.
, b, a pair of upper and lower rolling rolls 1 whose one end is connected to a drive source (not shown) and whose end is a driven rotating shaft.
A frame-shaped main body 15 is located around a universal joint 14 having coupling parts (coupling bosses) 13 that are removably connected to the roll necks 12 of 1, respectively. It is supported so as to be able to move up and down via a plurality of jacks 18 that are operated by the drive of a height adjustment motor 17 installed at the top. Rotating shafts 19 parallel to the axis of the rolling roll 11 are installed in shields on the main body 15 on both the left and right sides of the universal joint 14, and these rotating shafts 19
The upper end of the support arm 20, which has a substantially inverted T shape, and the upper end of the drive arm 21, which has an L shape, are each pinned symmetrically. A hard rubber-like elastic body 22 is attached to the part of the support arm 20 where the lower end of the universal joint 14 hits and where the universal joint 14 is recovered, and in this embodiment, it stably supports the universal joint 14. In order to do this, the lower end of each support arm 20 is extended in the axial direction of the rolling roll 11, so that the lower end of each universal joint 14 is supported at four locations in total, two in the front and back. As described above, in the present embodiment, one universal joint 14 is supported by the pair of left and right support arms 20, but it is also possible to support one universal joint 14 by only one support arm, and as shown in FIG. In this case, a support arm, a drive arm, etc. on either the left or right side becomes unnecessary.

In addition, a support arm 20 and a drive arm 2 are attached to one rotation shaft 19.
1 are coaxially pinned, but they may be pinned to separate rotation axes. A support arm 201 is formed.
The counter seat 23 is located above the lower end of the drive arm 21 , and the lower end of a spring shaft 24 passing through the spring seat 23 is fixed to the lower end of the drive arm 21 .

Further, an adjustment nut 26 having a seat plate 25 is screwed into the upper end of this spring shaft 24.
A compression coil and a counter 27 are interposed on the spring shaft 24 between the spring receiving seat 23 and the spring receiving seat 23 . Further, a hydraulic cylinder 28 whose upper end is pivoted to the main body 15 is connected to a drive arm 21.
In order to transmit rotational force to the drive arm 21, the lower end of the piston rod 29 is fixed to the lower end of the drive arm 21. In the present invention, the support arm 20 and the drive arm 21 are indirectly connected via the spring shaft 24 and the compression coil spring 27, and the piston rod 2 of the hydraulic cylinder 28
9 expands and the weight of the universal joint 14 and the compression coil spring 2
This universal joint 14 is supported in a state in which the spring force of 7 is balanced (see FIG. 3b). Note that the reference numeral 3 in the figure is a fine adjustment bolt that is screwed into the drive arm 21 in order to load a certain preload (compression force) onto the compression coil spring 27. By increasing or decreasing the screwing amount of the screw 30, the spring force of the compression coil 27 set by the adjustment nut 26 can be finely adjusted extremely quickly and easily. During the rolling operation when the rolling roll 11 and the universal joint 14 are connected, the piston rod 29 of the hydraulic cylinder 28 is retracted and the support arm 20 is connected to the universal joint 14, as shown in FIG. It is in a receded position to the side.

At this time, the fine adjustment bolt 30 is in contact with the spring seat portion 23 of the support arm 20 to prevent rotation of the support arm 20 due to the spring force of the compression coil spring 20. When replacing the rolling roll 11, first operate the height adjustment motor 17 to lift the main body 15 to a predetermined height, then move the piston rod 29 of the hydraulic cylinder 28 to its stroke end as shown in Figure 3b. When extended, the support arm 20 also begins to rotate due to the spring force of the compression coil spring 27 as the drive arm 21 rotates, and the rubber-like elastic body 22 first comes into contact with the lower end of the universal joint 14, but the drive arm 21 Since the support arm 20 is adjusted to rotate further, the rotation of the support arm 20 is prevented by the rolling roll 11 and the universal joint 14, and the compression coil spring 27 receives further compressive force, causing the fine adjustment bolt 30 and the support arm to rotate. 20 spring seat part 2
A gap 31 is formed between the two. In this state, a roll moving device for roll replacement (not shown) is operated, and the rolling roll 1 is
1 from the universal joint 14, the universal joint 14 was lifted somewhat upward by the spring force of the compression coil spring 27, which was in a compressed state, and the spring force of the compression coil spring 27 and the weight of the universal joint 14 were balanced. It stops in position, but
At this time, the fine adjustment bolt 30 and the spring seat portion 23 of the support arm 20 are made to come into contact with each other.

Note that it is possible to adjust the compression coil spring 27 to such a force that the universal joint 14 sinks downward to some extent when the roll neck 12 of the new roll 11 is pulled out from the universal joint 14. This universal joint 14
Since a large force is required to lift up the universal joint 14 when the universal joint 14 is aligned with the coupling part 13 of the universal joint 1,
It is desirable to adjust the spring force of the compression coil spring 27 so that the universal joint 14 is placed on the support arm 20 with the universal joint 4 slightly lifted. In the present invention, this spring force can be adjusted extremely quickly and easily by operating the fine adjustment bolt 30. When fitting a new rolling roll 11 to the universal joint 14 using the roll changing roll moving device, the coupling portion 13 of the universal joint 14
is located somewhat above the roll neck 12 of the rolling roll 11, so the universal joint 14 is pushed down somewhat against the spring force of the compression coil spring 27, so that it can freely connect to the rolling roll 11. The universal joint 14 joins the support arm 2 even if they are shifted left and right.
0, and there is no restraining force acting in the left and right directions like in the case of a slave, the universal joint 14 moves in the left and right direction with a small force, easily connecting the rolling roll 11 and the universal joint 14. and are joined.

Thereafter, as shown in FIG. 3a, the piston rod 29 of the hydraulic cylinder 28 is pulled back to its original position, and the height adjustment motor 17 is activated to lower the main body 15 to its original height, and the rolling operation is started. .

In this way, according to the support bag for a universal joint of the present invention, the universal joint is simply placed on the support arm, while the compression spring for balance in the balance mechanism can be adjusted by operating the fine adjustment bolt. Since the spring force can be adjusted quickly and easily, it is possible to extremely easily align the universal joint and the driven rotating shaft.

[Brief explanation of drawings]

Fig. 1a is a front view showing the schematic shape of a conventional universal joint support device incorporated in a rolling mill, Fig. 1b is a right side view thereof, and Fig. 2a is a rolling mill showing the universal joint support device according to the present invention. Front view showing the schematic shape of one embodiment incorporated into the machine, 2nd
FIG. 3b is a right side view of the device, FIGS. 3a and 3b are enlarged views showing the principle of operation of its main parts, and FIG. 3b is a supported state. In the drawings, 11 is a rolling roll, 14 is a universal joint, 15 is a main body, 19 is a rotating shaft, 2 river support arms, 21 is a drive arm, 23 is a spring seat, 24 is a spring shaft, and 26 is for adjustment. Nut, 27 is a compression coil spring, 28 is a hydraulic cylinder,
29 is a piston rod, and 30 is a fine adjustment bolt. Figure 1

01 Figure 1(b) Figure 2 [01] Figure 2 [b] Figure 3 (01 Figure 3 [b]

Claims (1)

[Claims] 1. A frame-shaped main body installed on the side of a universal joint having one end connected to a drive source and the other end having a coupling portion that removably engages with a driven rotating shaft, and a frame-shaped main body on which the universal joint is placed. a support arm rotatably fixed to the main body by a pin parallel to the driven rotation axis; a drive arm rotatably fixed to the main body by a pin parallel to the pin; a driving member for rotating the driving arm; a spring shaft passing through a spring seat formed on the support arm and having one end pivoted to the driving arm; and an adjusting nut screwed into the other end of the spring shaft. and a compression spring interposed on the spring shaft between the spring seat and the adjustment nut.