JPS60497Y2 - Shaft coupling attachment/detachment device - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a shaft joint, and more specifically, to an attachment/detachment device that facilitates connection or disconnection of a joint that connects a work roll shaft and a universal joint at the end of a drive shaft. .

For example, to connect the work roll of a rolling mill and a universal joint provided at the end of the drive shaft system, a first flange fitted and keyed onto the work roll shaft 1 as shown in Fig. 1 is used. A second joint provided at the flange of the joint piece 2 and the free end of the universal joint 3
It is customary to use a so-called flange joint in which the flanges of the flange joint pieces 4 are butted together and tightly fixed by tightening the connecting bolts 5.

This joint is suitable for transmitting large amounts of power, but when removing the roll from the roll stand for roll replacement etc., remove the 6 to 8 bolts 5 tightening both flanges to disconnect the joint. After that, the roll must be removed from the stand. Also, when installing the roll, the flange surfaces of the joint must be parallel, the bolt holes must be aligned, the bolts must be passed through, and the nuts must be tightened to connect. Because the machine is a heavy shaft and incorporates a universal joint, it is difficult to align the centers or bolt holes, and it requires a considerable amount of man-hours, especially in the case of a molding machine with a large number of stands. This is accompanied by physical and mental fatigue, which is a factor that prolongs the reclassification time.

The purpose of the present invention is to provide a shaft joint attachment/detachment device that solves the above-mentioned problems. The first cylindrical joint piece 11 has an engaging groove 13 and is fitted and fixed to the work roll shaft 12. The first cylindrical joint piece 11 has a groove 18 that engages with a pawl 22 at the other end of the fastening fitting 20 and is attached to the drive device side. Tightening bolts are attached to the outer circumferential surfaces of the second cylindrical joint piece 16 and one cylindrical joint piece 11 provided at the free end of the universal joint 26 in a band shape with a gap between them via a compressed spring 36. 35, and when the tightening bolt 35 is inserted and removed, the claws 21 and 22 at both ends are connected to the cylindrical joint pieces 11 and 16, respectively.
It consists of a plurality of fastening fittings 20 that are engaged with or released from the fastening fittings 20, and one of the grooves in which the two claws 21 and 22 of the tightening fittings 20 engage, and in which the long claw 21 engages, is a cylindrical joint. A guide and engagement groove 13 provided in a direction perpendicular to the axis of the piece,
A groove 18 in which a short claw 22 engages, having an engagement slope 23
The wall surface is an outwardly inclined wall surface 19, and meshing teeth 15, 17 each having a trapezoidal cross section are provided radially outward from the axis on the mutually opposing end surfaces of the cylindrical joint pieces 11, 16. The two claws 21 and 22 of the plurality of tightening fittings 20 and the engagement grooves 13 of the same cylindrical joint pieces 11 and 16 are provided.
By engaging or disengaging with 18, the same cylindrical joint pieces 11 and 16
This relates to an attachment/detachment device for a shaft coupling that can be connected or disconnected using an insertion/extraction clutch.

Next, the embodiment shown in FIGS. 2 to 11 of the accompanying drawings will be described.

A cylindrical first joint piece 11 that is fitted onto the work roll shaft 12 and fixed to the roll shaft 12 by a key (not shown) has a ring-shaped groove 13 cut into its outer peripheral surface. One end of two or more fastening fittings 20 (FIG. 2 shows the attached state of one fastening fitting, and other fastening fittings are omitted) attached to the outer peripheral surface of one joint piece 11. The long claw 21 is inserted and locked, and is guided by the side surface of the groove to move in the radial direction to move in and out of the groove 13.

For example, four tightening bolt holes 14 for fixing the tightening fittings 20 to the joint piece 11 are provided on the outer peripheral surface, corresponding to the number of the tightening fittings 20.

On the connecting side end surface of the joint piece, meshing teeth 15 having a trapezoidal cross section are provided radially outward from the shaft center at appropriate pitches.

The second joint piece 16 connected to the first joint piece 11 is provided with meshing teeth 17 that mesh with the meshing teeth 15 on its connecting end surface.
Together with the meshing teeth 15, they constitute the meshing teeth of a meshing clutch, that is, an insertion/extraction clutch.

A groove 18 is provided on the outer circumferential surface of the joint piece, into which the other pawl 22 of the fastening fitting 20 having an engaging slope 23 engages.

The engaging surface 19 of the groove 18 is inclined, and when the tightening bolt 35 of the tightening fitting 20 is tightened, the inclined surface 23 of the pawl 22 aligns with the groove 1.
Since it slides and advances in the axial direction while engaging with the engagement slope 19 of No. 8, the second joint piece 16 is pressed toward the first joint piece 11 while the meshing teeth 15 and 17 having a trapezoidal cross section mesh with each other. It looks like this.

A flange joint 25 is provided on the end 24 of the second joint piece 16 opposite to the end surface where the meshing teeth 17 are provided, and is mated with a flange joint 27 provided at the free end of the drive side universal joint 26. They are connected by a connecting bolt 28.

In addition, what is shown in FIG. 2 shows the case where the flange joint 27 at the free end of the universal joint 26 of the conventional structure is left as is, and the flange joint 25 of the second joint piece 16 is connected to it. Even if a new joint is manufactured and the second joint piece 16 is integrally provided at the free end, the effects of the present invention will not change.

Spline teeth 30 are machined on the universal joint shaft 29,
The cylindrical joint 31 may be inserted into and taken out of the cylindrical body by suspending the universal joint shaft 29 with a crane as in the past, but it is convenient to carry out the following procedure.

Several slits are provided at the end of the cylindrical joint 31 on the shaft 32 side, and the joint 3 is tightened by screwing in the tightening nut 37.
1 is fixed to the shaft 32.

Alternatively, the cylindrical body of the cylindrical joint 31 may be provided integrally with the shaft 32.

A rack 33 cut into the universal joint shaft 29 is meshed with a pinion 34 that is pivotally supported on the cylindrical body of the joint 31.
If the shaft 29 is moved in and out of the cylindrical body of the cylindrical joint 31 by rotating the shaft 29, the shaft 29 can be finely moved from side to side with a small amount of force.

Since the structure is as described above, firstly, to explain the case of connection, the first joint piece 1 is attached to the roll shaft 12 in advance.
1 and fixed with a key (not shown), the roll is hung by a crane and assembled into a roll stand.

After installing the roll in the roll stand, the first joint piece 11
may be fitted onto the roll shaft 12.

When using the conventionally structured universal joint 26, the universal joint 2
The second joint piece 1 is attached to the flange joint 27 provided at the free end of 6.
6 with bolts 28.

Instead of suspending the universal joint shaft 29 with a crane and moving it from side to side, the universal joint shaft 29, which is a cut of spline teeth, is moved by a pinion 34 and a rack 33, as shown in FIG.
When inserting and removing the universal joint shaft 29 into and out of the cylindrical body of the cylindrical joint 31, the pinion 34 is rotated to feed out the universal joint shaft 29 from the cylindrical body of the cylindrical joint 31, and the first
The end of the roll shaft 12 on which the joint piece 11 is fitted and fixed is inserted, and the second joint piece 16 is moved toward the first joint piece 11.

A slight gap is set between the outer diameter of the end of the roll shaft 12 and the inner diameter of the center hole of the second joint piece 16, and a position for attachment and detachment, in other words, a position where the meshing teeth 15 and 17 mesh. Since the second joint piece 16 is positioned closer to the roll than the end of the roll shaft 12, the second joint piece 16 is guided by the roll shaft 12 and moves to the meshing position.

When the meshing teeth 15 and 17 of both joint pieces come close to contacting each other, the roll shaft 12 is slightly rotated within the pitch of the meshing teeth so that the meshing teeth 15 and 17, which have trapezoidal cross sections, mesh with each other. Further, the universal joint shaft 29 with the spline teeth 30 cut out is extended to mesh the meshing teeth 15 and 17.

The cross-sections of the meshing teeth 15 and 17 are chevron-shaped, and the sides of the teeth are sloped so that they become thicker toward the bottom of the valley, so that the teeth mesh smoothly.

Next, one of the long claws 21 bent at right angles is inserted into the guide groove 13 of the first joint piece 11, and the tightening bolt 35 is inserted into the first joint piece 1.
1, the other claw 22 of the fastening fitting 20 attached to the second joint piece is inserted into the engagement groove 18 of the second joint piece, and the tightening bolt 35 is tightened. Since the slope 19 of the engagement groove 18 of 16 is pushed diagonally outward toward the first joint piece 11, the second joint piece 16 is drawn toward the first joint piece 11 and both joint pieces 11 and 16 are pushed together. are strongly connected.

If two or more fasteners are used at equal intervals, they will be tightened at symmetrical or equiangular positions, ensuring a secure connection.
Also, since the axes of both joint pieces are aligned on the same axis, alignment is achieved.

A spring 3 is attached to the upper part of the bolt hole 14 of the tightening bolt 35.
6 is inserted in a compressed state, so when loosening the bolt 35, the tightening fitting 20 is moved into the guide groove 1 by the elasticity of the spring.
3, which is convenient because you don't have to touch it with your hands.

When you want to disconnect the first joint piece 11 and the second joint piece 16 and separate them, use the reverse procedure to the above.
Loosen the tightening bolt 35 and insert the tightening fitting 20 into the guide groove 13.
, the short claws 22 of the fastening fitting 20 will come off the engagement surface 19 of the second joint piece, and the long claws 2
Even if the second joint piece 1 is engaged with the guide/engaging groove 13 of the first joint piece, the second joint piece 16 can be moved laterally, so both the joint pieces 11 and 16 can be separated. .

This relationship can be easily understood from Figures 11a and 11b.

Rotate the pinion 34 to connect the universal joint shaft 29 to the cylindrical joint 31
As it is taken into the inside, the second joint piece 1
6 also gradually moves away from the first joint piece 11, and the roll shaft 1
2, the second joint piece will separate from the roll shaft 12 to the foot metal.

Next, the roll is lifted by a hoist and removed from the roll stand, a replacement roll is assembled into the roll stand, and the first and second joint pieces 11, 16 are connected as described above.

In the above description, the first joint piece 11 has a guide/engaging groove 13 for the long claw 21 of the fastening metal fitting 20, and the second joint piece 16 has an inclined surface 19 in which the short claw 22 of the fastening metal fitting engages. Although the groove 18 is provided, it is also possible to provide the groove 18 in which the short pawl 22 engages in the first joint piece and the guide/engaging groove 13 in which the long pawl 21 of the fastening fitting engages in the second joint piece 16. Similar effects can be obtained.

As mentioned above, unlike the conventional flange joint that connects and disconnects the device, the device of the present invention connects and disconnects the two joint pieces 11 and 16 using the fastening fitting 20, so when connecting, the work roll is used. Using the shaft 12 as a guide shaft, the second joint piece 16 having a center hole with an inner diameter slightly larger than the second joint piece 16 is inserted into the shaft end of the roll shaft 12 and moved toward the roll side, thereby making the fitting easy.

The meshing teeth 1 are used to connect the first joint piece 11 and the second joint 16.
5 and 17, the rolls can be easily brought into meshing position on the same axis by slightly rotating the rolls within a pitch of 15° and 17 meshing teeth.

In addition, since the meshing teeth 15 and 17 have a trapezoidal cross-sectional shape, when the second joint piece 16 is moved toward the first joint piece 11, the first joint piece 11 automatically moves to the first joint piece 11 due to the meshing of the teeth with the trapezoidal cross-section.
Therefore, the rolls rotate and the mesh becomes deeper.

After they are sufficiently engaged with each other, it is sufficient to tighten the plurality of fastening fittings 20, which are attached to the outer circumferential surface in a band-like manner and spaced apart from each other, using the tightening bolts 35. Unlike this, there is no need to align the connecting bolt holes, and the connection can be easily fixed.

The movement of the universal joint shaft 29 in the axial direction within the cylindrical body of the cylindrical joint 31 when engaging and disengaging the insertion/removal clutch may be carried out by suspending it with a usual refrain, or by using a universal joint. Cut a rack 33 on the shaft 29 and attach the cylindrical joint 3
If it is engaged with the pinion 34 provided at 1, it can be easily moved.

In the present invention, the work roll and the drive shaft system are connected or separated by first and second joint pieces 11 using a dog clutch, that is, an insertion/extraction clutch, instead of using a conventional flange joint.
．． 16, and the connection is performed by engaging and disengaging the 11th and 2nd joint pieces 1.
1 and 16 are engaged and tightened with the clamping fitting 20, and when the work roll is to be removed from the drive shaft system, the flange joints 25 and 27 are left connected and tightened with the tightening fitting 20. If the tightening bolt 35 is loosened, the tightening fitting 20 will release the long claw 21 due to the elasticity of the spring 36.
The joint piece 11 is guided by the guide and engagement groove 13 that is engaged with the joint piece 11,
16, and the short claws 22 of the fastening fitting come off the engagement surface 19 of the second joint piece 16, so the second fitting piece can be removed without removing the fastening fitting 20. 16
It is now possible to move horizontally, and Dokei Hirai 11 and 16
will be able to leave.

Furthermore, when the tightening bolt 35 is tightened, one long claw 21 of the tightening fitting is guided by the guide/engaging groove 13, and the joint pieces 11, 1
6, the short claw 22 with the other inclined surface 23 is the second joint piece! 6, the second joint piece 16 is drawn toward the first joint piece 11, and when tightened from several places on the outer circumference with a plurality of fastening fittings 20, the cross section becomes trapezoidal. meshing teeth 15, 17
Due to the meshing of the two, the axes of the dome hirai are aligned, and alignment is performed naturally.

As mentioned above, it is now possible to easily align, connect, and disconnect the Dokei Hirai, improving work efficiency,
Its practical effects, such as reducing worker fatigue, are extremely large.

[Brief explanation of drawings]

Fig. 1 is a partially exploded front view for explaining a conventional shaft coupling, and Figs. 2 to 11 are drawings showing embodiments of the present invention.
The figure is a partially exploded front view of the shaft joint attachment/detachment device, Figure 3 is a partially exploded front view showing an example of the universal joint shaft moving device, Figure 4 is a central sectional view of the first joint piece, and Figure 5 is the 6 is a central sectional view of the second joint piece, 7 is a left side view, 8 is a right side view, 9 is a side view of the fastening fitting, and 10 is a right side view. is also a central sectional view, FIG. 11a. b is a partially exploded side view for explaining engagement and release of the fastening fitting. 11... First joint piece, 12... Field shaft, 13...
Guide and engagement groove, 14... Tightening bolt hole, 15... Meshing tooth, 16... Second joint piece, 17... Meshing tooth, 18
...Engagement groove, 20...Tightening fitting, 21, 22...
Claw, 25...Flange joint, 26...Universal joint, 2
7... Flange joint, 28... Connection bolt, 29.
...Universal joint shaft, 30...Spline tooth, 31...
Cylindrical joint, 32... Drive shaft, 33... Rack, 34
... Zenion, 35... Tightening bolt, 36... Spring, 37... Joint nut.

Claims (1)

[Claims for Utility Model Registration] A shaft joint attachment/detachment device for connecting a drive device to a work roll, which has a groove 13 in which a pawl 21 at one end of a clamping fitting 20 engages, and is fitted and fixed to the work roll shaft 12. a first cylindrical joint piece 11, which is provided at the free end of the universal joint 26 on the driving device side, and which has a groove 18 that engages with the pawl 22 at the other end of the fastening fitting 20; The piece 16 and one cylindrical joint piece 11 are screwed to the outer circumferential surface of the piece 16 by means of tightening bolts 35 via compressed springs 36 in a band-like manner and spaced apart from each other. Certain claws 21 and 22 are connected to the cylindrical joint pieces 11 and 16, respectively.
It consists of a plurality of fastening fittings 20 that are engaged with or released from the fastening fittings 20, and one of the grooves in which the two claws 21 and 22 of the tightening fittings 20 engage, and in which the long claw 21 engages, is a cylindrical joint. A guide and engagement groove 13 provided in a direction perpendicular to the axis of the piece,
A groove 18 in which a short claw 22 engages, having an engagement slope 23
The wall surface is an outwardly inclined wall surface 19, and the mutually opposing end surfaces of the cylindrical joint pieces 11 and 16 are provided with meshing teeth 15 and 17 each having a trapezoidal cross section and radiating outward from the axis. The two claws 21 and 22 of the plurality of tightening fittings 20 and the engagement grooves 13 of the cylindrical joint pieces 11 and 16 are
Cylindrical joint pieces 11, 16 by engaging or disengaging with 18
A shaft coupling attachment/detachment device that can be connected or disconnected using an insertion/extraction clutch.