JPH0343469Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a universal joint attachment/detachment device that removably connects a rotating shaft such as a roll shaft in a roll forming machine, etc. and a universal joint such as the end of a drive shaft system. Regarding.

[Prior Art] For example, in a roll forming machine, a roll shaft of a forming stand and a drive shaft corresponding to each roll shaft are generally connected by a universal joint device having universal joints at both ends. Conventionally,
As shown in Fig. 5, the mechanism for connecting this roll shaft and the universal joint device is a keyed flange plate 2 (keyed 2
a) and a flange plate 4 with a key groove on the side of the roll shaft 3 (the key groove is shown as 4a).
Butt so that a fits into the keyway 4a, and
Generally, they are connected by tightening a set of bolts 5 and nuts 6.

[Problems to be solved by the invention] In the above-mentioned roll forming machine, when the rolls are rearranged to change the product type, generally the upper and lower two
Stages, several rows to ten or more rows of forming rolls are replaced with each roll shaft, but in this case, it is necessary to frequently attach and detach the roll shaft 3 and the universal joint 1 of the universal joint device A.

By the way, in the above-described attachment/detachment mechanism using the flange plates 2 and 4, the work of connecting the roll shaft 3 and the universal joint 1 requires lifting the heavy portion of the universal joint 1 with one hand.
The work involves inserting the bolt 5 with the other hand, but this work is not easy because the angle of the universal joint 1 is not constant. especially,
When connecting the lower roll shafts of the upper and lower roll shafts, the working posture becomes unreasonable and the workability becomes even worse. Therefore, it takes time to reassemble the rolls, and the operating rate of the roll forming machine decreases.

This invention was made in view of the above circumstances,
To provide a universal joint attachment/detachment device that can easily attach and detach a rotating shaft and a universal joint.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a universal joint attachment/detachment device for attaching and detaching a rotating shaft and a universal joint. a first joint piece and a second severing piece that are respectively fixed to the universal joint and mesh with each other through planar gears formed on opposing surfaces, and the first severing piece or the second joint. A boss provided at the center of one gear surface of the piece, a boss insertion hole provided at the center of the other gear surface, and a plurality of holes attached to the outer periphery of the first joint piece so as to be openable and closable in the radial direction with one end as a fulcrum. a pawl; a spring that pushes the other end of the pawl radially outward to urge the pawl to open; and a spring that is provided to cover the pawl and moves to one side of the second joint to close the pawl and open the pawl. and a locking member whose tip end is engaged with a groove provided on the outer periphery of the second joint piece.

[Function] In the above configuration, when connecting the rotary shaft and the universal joint, the boss of one joint piece is inserted into the boss insertion hole of the other joint piece, and the planar gear of the first joint piece and the second section are connected. When the planar gear of the joint piece is engaged and the lock member provided on the first joint piece is moved in one direction of the second joint piece, the pawl closes by the lock member and the tip of the pawl fits into the groove of the second joint piece. engage with. This allows the first joint piece and the second
The joint pieces are connected to each other with planar gears meshing with each other, and rotational force is transmitted by the planar gears meshing with each other.

When separating the rotary shaft and the universal joint, the lock member is returned to the opposite direction of the second joint, and the claw is biased by the spring to open and the tip of the claw is removed from the groove of the second joint piece. , the first joint piece and the second joint piece can be separated.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4.

In this embodiment, for example, a roll shaft of a forming stand in a roll forming machine for pipe production and a universal joint at the end of a universal joint device are removably connected. Fig. 1 is a partial sectional view of the drive transmission unit including the universal joint device A in a connected state, Fig. 2 is an enlarged view of the same essential parts, Fig. 3 is a partial sectional view of the detached state, and Fig. 4 is a disengaged state. It is a perspective view of a state. In Fig. 1 etc., 10 is a roll axis;
11 is the transmission shaft of the universal joint device A;
12 is a constant velocity ball joint attached to the end of the transmission shaft 11 on the side of the roll shaft 10, and 13 is a constant velocity ball joint attached on the end of the transmission shaft 11 on the side of the drive shaft (reducer output shaft) B. It is an int. The constant velocity ball joints 12 and 13 have a structure that uses self-aligning ball bearings to allow the intersection angle of the shafts, and are used as universal joints.

A first joint piece 14 is fixed to the constant velocity ball joint 12 on the roll shaft side with a plurality of bolts 15, while a second joint piece 16 is engaged with the end of the roll shaft 10 with a key 17. There is. Planar gears 14a and 16 that mesh with each other are provided on opposing surfaces of the first joint piece 14 and the second joint piece 16.
a, a boss 14b is fixed at the center of the gear surface of the first joint piece 14, and a boss insertion hole 16b into which the boss 14b is inserted is formed at the center of the gear surface of the second joint piece 16. . Further, four recesses 14c for attaching claws are formed on the outer periphery of the first joint piece 14, and each recess 14c has a claw 18.
One end is rotatably attached via a pin 19, and a spring 20 is arranged to bias the second joint piece 16 side of the pawl 18 radially outward. Furthermore, a screw 14d is formed on the outer periphery of the first joint piece 14, and a lock nut 21 is screwed into this screw 14d portion. 21a is a wrench projection for turning the lock nut 21. Furthermore, a groove 16c is formed in the outer circumference of the second joint piece 16 in the circumferential direction, in which the tip of the pawl 18 is engaged.

The end of the transmission shaft 11 is formed into a spline 11a, and the constant velocity ball joint 12 is slidably engaged with the spline 11a. A washer 2 is attached to the tip of the spline 11a.
2 is fixed with a screw 23, while the first joint piece 1
4 is hollow as shown in the figure, and the washer 22 is fitted when the first joint piece 14 slides together with the constant velocity ball joint 12 toward the drive shaft B (to the left in FIG. 1, etc.). A hole 14e for insertion is made.

Next, the operation of attaching and detaching the universal joint attaching and detaching device will be explained.

Roll shaft 10 and universal joint device A
When the universal joint 12 of the third
As shown in FIG. 4, the lock nut 21 is in a position to the left in the figure, and the pawl 18 is open. The operation of connecting these is the first joint piece 1
4 into the boss insertion hole 16b of the second joint piece 16, and the planar gear 14a of the first joint piece 14 and the planar gear 16a of the second joint piece.
interlock with. In this case, the boss 14b and the boss insertion hole 16b serve as guides during gear engagement, and also serve to maintain the centering accuracy of both joint pieces 14, 16. In addition, when the boss 14b is inserted and the planar gears 14a, 16a are engaged, the joint pieces 14, 16 are in a temporarily assembled state and will not fall even if the hands are released, so the next work can be done with both hands. It can be done by one person.

Next, when the lock nut 21 is rotated one or two times, the lock nut 21 is turned to the other side, that is, the second
Move to the joint piece 16 side (right side in the figure), press the back part of the claw 18 to close the claw 18, and then close the claw 18.
Engage the tip of the second joint piece 16 with the groove 16c on the outer periphery of the second joint piece 16, and then use a wrench exclusively for rotation to
When the lock nut 21 rotates by 1.5 turns, the force with which the lock nut 21 presses the back of the pawl 18 increases due to the wedge effect, so that the tip of the pawl 18 is strongly pressed against the groove 16c. At this time, due to the structure in which the tip of the claw 18 and the groove 16c are in contact with each other on the tapered surface, the second joint piece 16 is strongly attracted, and both joint pieces 14, 16
The planar gears 14a and 16a are tightly interlocked with each other without any gaps. The pawl 18 is then locked by the lock nut 21, and will not open and become disconnected during rotation.

The disengagement operation is the reverse of the above, and when the lock nut 21 is rotated in the opposite direction, the lock nut 21 moves to the left in each figure, and the pawl 18 is moved to the left by the spring 2.
It opens outward with zero force, the tip of the claw 18 comes off the groove 16c of the second joint piece 16, and both joint pieces 14,1
6 will be able to leave. Here, when the universal joint 12 is slid on the spline 11a toward the drive source side (to the left in each figure), the double-sided gears 14a, 16
a are spaced apart from each other, but at the same time, the splines 11
The washer 22 at the tip of a is inserted into the hole 14 of the first joint piece 14.
e, the first joint piece 14 is held by this washer 22, and the first joint piece 14 is prevented from hanging down at the universal joint part of the universal joint 12.

In the above attachment/detachment operation, both joint pieces 14, 1
The distance in the axial direction required for attaching and detaching the gears 6 can be as short as, for example, about 20 mm, as long as it is enough to disengage the planar gears 14a and 16a and prevent the pawls 18 from interfering with each other. . Therefore,
As in the embodiment, when used in combination with a universal joint having a spline 11a portion, there is no need to provide a special sliding part for attachment/detachment operation.
A spline length that corresponds to the axis intersection angle is sufficient to handle attachment and detachment operations.

Further, in the above embodiment, the claw 18 and the spring 2
0. Complex parts such as the lock nut 21 are installed on the joint piece 14 on the drive side (universal joint device A side), and the joint piece 16 on the driven side (roll shaft 10 side), which requires a large number of spare parts for each product type. By configuring it as a single unit, the price is kept low.

Although the embodiment uses a constant velocity ball joint as the universal joint, it is of course applicable to a general cross-pin type universal joint. In this case, the structure is such that the bifurcated portion supporting the cross pin of the universal joint is provided integrally with the first joint piece.

Further, in the embodiment, the lock nut 21 that is screwed onto the outer periphery of the first joint piece 14 is used as the lock member, but it does not necessarily have to be a screw.
By simply sliding the claw 18 in the axial direction,
It can also be a mechanism that opens and closes.

In addition, although the embodiment is applied to the connecting part between the end of the drive shaft system of a roll forming machine and the roll shaft,
It can be applied to various industrial machines, and is particularly suitable when the drive transmission part needs to be frequently attached and detached.

[Effects of the invention] As explained above, according to the invention, the planar gears are fixed to the ends of the rotating shaft and the universal joint to be connected to the rotating shaft, and are formed on the opposing surfaces. a first joint piece and a second joint piece that engage with each other; a boss provided at the center of one gear surface of the first joint piece or the second joint piece; and a boss insertion hole provided at the center of the other gear surface; a plurality of pawls attached to the outer periphery of the first joint piece so as to be able to open and close in the radial direction with one end as a fulcrum, and a spring that pushes the other end of the pawl outward in the radial direction and urges the pawl to open; A locking member is provided to cover the pawl and moves to one side of the second joint to close the pawl and engage the tip of the pawl with a groove provided on the outer periphery of the second joint piece. , has various excellent effects such as the following.

(i) It has become possible to attach and detach the rotary shaft and the universal joint extremely easily, so to speak, with a single touch.

(ii) The boss at the center of the gear surface of the joint piece functions to accurately center and connect both joint pieces, and also serves as a guide for gear meshing during connection, and also serves as a guide for gear meshing when connecting, and also temporarily holds both joint pieces together after inserting the boss. Since it is in an assembled state, you can remove your hand from the universal joint and perform the next operation with both hands, making attachment and detachment work much easier.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the universal joint attachment/detachment device of the present invention, and is a partial sectional view of the connected state of the drive transmission part, Fig. 2 is an enlarged view of the main parts in Fig. 1, and Fig. 3
4 is a perspective view of the detached state, and FIG. 5 is a perspective view of a conventional universal joint attachment/detachment device. 10...Roll axis (rotation axis), 11...Transmission shaft,
12... Constant velocity ball joint (universal joint),
14...first joint piece, 14a...plane gear, 1
4b... Boss, 16... Second joint piece, 16a...
...Flat gear, 16b...Boss insertion hole, 16c...
Groove, 18...Claw, 20...Spring, 21...
Rotsuknut.

Claims (1)

[Claims for Utility Model Registration] In a universal joint attachment/detachment device for attaching and detaching a rotating shaft and a universal joint, the device is fixed to an end of the rotating shaft and the universal joint to be connected to the rotating shaft, and is opposed to the rotating shaft. A first joint piece and a second joint piece that engage with each other through planar gears formed on their respective faces; a boss provided at the center of one gear face of the first joint piece or the second joint piece; and a boss provided at the center of the other gear face. a boss insertion hole provided in the first joint piece; a plurality of pawls attached to the outer periphery of the first joint piece so as to be able to open and close in the radial direction with one end as a fulcrum; a spring that biases the nail to open; and a lock that is provided to cover the pawl and moves to one side of the second joint to close the pawl and engage the tip of the pawl with a groove provided on the outer periphery of the second joint piece. A universal joint attachment/detachment device comprising: